How Barnet’s Population Grew Over Time: History and Census Data

Barnet’s population growth reflects the transformation of northern Middlesex and the northern edge of London from rural settlements into a large metropolitan borough. The modern London Borough of Barnet contains historic communities including High Barnet, East Barnet, Finchley, Hendon, Edgware, Golders Green, Mill Hill, Burnt Oak, Whetstone and Totteridge.

The population did not increase at one constant rate. Growth accelerated when roads, railways, trams and underground services connected local settlements with central London. New housing followed transport infrastructure, while employment, industry and later regeneration created additional demand for homes.

The modern borough also has a complicated statistical history. The present-day administrative boundary was created in 1965, while earlier population figures relate to separate parishes, urban districts and municipal boroughs. Barnet Council therefore warns that historical comparisons before the twentieth century require care because boundaries changed frequently.

The 2021 Census recorded 389,340 residents in Barnet, making it the second-largest London borough by population. Between 2011 and 2021, its population increased by about 9%, compared with 7.6% across London and 6.6% across England.

This long-term growth explains much of Barnet’s present urban character. Historic market centres sit alongside Victorian terraces, inter-war suburban estates, post-war housing and newer regeneration districts.

How large was Barnet’s population before modern suburban growth?

Before suburbanisation, Barnet consisted of small villages, parishes and rural communities rather than one large urban population, with High Barnet, East Barnet, Finchley, Hendon and Edgware developing at different speeds around roads, markets, farming and local institutions.

Barnet’s early population was dispersed across settlements and agricultural areas. High Barnet developed around an important route between London and St Albans. Barnet Council records that Barnet existed before the Norman Conquest and that an important northern route passing through the area helped a town develop.

The historic settlement pattern was very different from the modern borough. Large areas consisted of woodland, common land, farms and open countryside.

Finchley provides a useful example. Medieval Finchley included extensive woodland associated with the Bishop of London. Agricultural activity expanded over subsequent centuries, while hay production became important because London required fodder for its horses.

Edgware also developed as a small settlement serving travellers. By the Elizabethan period, Barnet Council records a substantial village along the route from Edgware Bridge towards the church of St Margaret. Its population was about 120 at that time.

Monken Hadley illustrates the small scale of some historic communities. Its recorded population increased from 584 in 1801 to 1,053 in 1861, before later nineteenth-century growth.

These figures cannot simply be added together to create a continuous Barnet population series. The administrative units were different and their boundaries changed.

The Office for National Statistics has maintained national census records from 1801 onwards, providing the framework for studying population change over more than two centuries.

When did Barnet’s population begin to grow rapidly?

Barnet’s rapid population growth began during the nineteenth century as railways and improved roads reduced travel times and encouraged suburban housing, allowing rural settlements such as Hendon, Finchley and areas around Barnet to absorb residents connected with London.

Transport was the decisive mechanism behind the transformation.

Before railways, travelling between northern settlements and London was slower and more expensive. The main roads supported coaching, markets and local trade, but daily commuting remained limited.

The railway changed that relationship.

In Finchley, the Great Northern Railway opened a station at Colney Hatch, now New Southgate, in 1851. The Edgware, Highgate and London Railway reached Finchley in 1867 and extended a branch towards Barnet in 1872. Trams later strengthened suburban connections.

Hendon shows the effect particularly clearly. Around 4,000 people lived there in 1861. The Midland Railway reached Hendon during the 1860s, reducing transport costs and encouraging new housing around Brent Street, Church End, Cricklewood, Childs Hill and West Hendon. By 1901, Hendon had around 22,000 residents.

Cricklewood developed alongside the Midland Railway. Its station opened in 1868, followed by the development of the Midland Railway’s locomotive works and workers’ accommodation. Suburban roads and railway services subsequently expanded the settlement.

Finchley followed a similar pattern. Barnet Council states that intensive housing development began after the arrival of the railways, with suburbanisation accelerating towards the end of the nineteenth century.

The process was therefore not simply population growth. It was urban expansion linked to accessibility.

As travel became cheaper and faster, households no longer needed to live immediately beside their workplaces in central London. Land on the metropolitan fringe became suitable for housing.

How did railways and the Underground transform Barnet?

Railways, trams and Underground extensions transformed Barnet by making longer-distance commuting practical, stimulating housebuilding and turning previously separate villages into interconnected suburban districts serving London’s expanding population and economy.

The Underground created another major phase of growth.

Golders Green Underground station opened in 1907, providing a fast and affordable connection with central London. The Underground was extended to Hendon in 1923. Barnet Council records Hendon’s population at about 115,000 by 1931.

Edgware experienced a comparable transformation. Its nineteenth-century railway connection did not immediately reverse population decline. Growth accelerated after improved public transport, including the extension of the Underground from Golders Green, completed in 1924. By 1930, Edgware had a busy shopping centre surrounded by suburban streets.

Finchley also became increasingly suburban. Trams began operating in the area in 1905, and the district had developed into a substantial suburb by 1914. The Northern Line later became part of the London Underground network, strengthening its connection with central London.

Transport also influenced the location of new housing.

Stations created focal points for shops, services and residential streets. Main roads supported additional development. The result was a network of suburban centres rather than a single dominant town.

This pattern explains why modern Barnet has several distinct urban identities. High Barnet has a historic market-town core. Finchley contains several established centres. Hendon has strong transport and employment connections. Edgware functions as a major northern centre. Golders Green developed as a significant residential and commercial district.

The population increased because these places became easier to reach and increasingly integrated into Greater London.

How much did Barnet grow during the early twentieth century?

Barnet experienced its strongest historical expansion during the late nineteenth and early twentieth centuries, when suburban housing, transport improvements, employment growth and London’s outward expansion rapidly increased populations across Hendon, Finchley, Barnet, Edgware and neighbouring districts.

The available historical figures show the scale of this transformation.

Hendon’s parish population rose from 1,955 in 1801 to 4,544 in 1861. It then increased to 15,843 in 1891, 22,450 in 1901, 40,039 in 1911, 57,529 in 1921 and 115,682 in 1931.

The figures demonstrate a major acceleration after the arrival of railways and later Underground services.

Finchley also expanded substantially. A historical Barnet Council account records a population of 58,964 in 1931, by which point the district’s major expansion was largely complete.

Barnet Town itself increased from 8,367 residents in 1901 to 10,440 in 1911, 10,971 in 1921, 13,702 in 1931, 19,841 in 1951 and 20,677 in 1961.

East Barnet also changed substantially, although historical administrative boundaries complicate direct comparison. Its recorded population was 2,118 in 1901, rising to 3,763 in 1921 and much higher levels by the middle of the twentieth century.

The inter-war period was particularly important because large areas of previously open land were converted into residential neighbourhoods.

Housing estates, semi-detached houses, detached houses, shops, schools and local services created a suburban landscape that remains visible today.

Transport therefore acted as an engine for demographic change. Employment growth strengthened that effect. Hendon developed factories and industrial activity, while Finchley contained manufacturing and other employment sites. The combination of employment and commuting helped sustain population growth.

Why did Barnet become a large suburban borough after 1945?

After the Second World War, Barnet’s population reflected decades of suburban expansion, established housing communities, post-war development and the consolidation of neighbouring districts into the modern London Borough of Barnet in 1965.

The modern borough was created in 1965 as part of the reorganisation of London government. Several former local authorities and urban districts were combined to create the London Borough of Barnet.

This administrative change is important when examining population history.

A figure for “Barnet” before 1965 does not necessarily describe the same geographical area as the modern borough. Barnet Council specifically notes that historical boundaries changed frequently and that consistent comparisons are difficult before the twentieth century.

The new borough incorporated communities with different demographic histories.

Hendon had experienced intense industrial and suburban growth. Finchley had developed into a large residential suburb. Edgware had expanded around transport and shopping. High Barnet retained its historic market-town role. Mill Hill and Totteridge retained larger areas of open land and lower-density housing.

Post-war planning also influenced the geography of population.

Green Belt protection restricted development in parts of the borough. Totteridge provides a clear example. Barnet Council records that post-war Green Belt legislation stopped further development across parts of Dollis Valley and Totteridge Valley.

This created an uneven population pattern.

Some areas became highly urbanised and densely populated. Other areas retained open landscapes, parks, farmland and lower-density residential streets.

Modern Barnet therefore combines high-density urban neighbourhoods with suburban and semi-rural landscapes.

How has Barnet’s population changed since 1965?

Since the formation of the London Borough of Barnet in 1965, population growth has continued through housing development, demographic change and migration, with the borough reaching 389,340 residents at the 2021 Census.

The post-1965 period is easier to analyse because the modern borough provides a consistent administrative framework.

Population growth continued through the late twentieth century, although the pace varied between neighbourhoods and decades.

By the twenty-first century, Barnet had become one of London’s largest boroughs.

The 2011 Census recorded about 356,836 residents, while the 2021 Census recorded 389,300 to 389,340 residents, depending on the published statistical source and rounding. Barnet Council reported an increase of nearly 35,000 people, equivalent to 9.2%.

The Office for National Statistics also recorded Barnet’s population increase at 9.2% between 2011 and 2021. That was higher than England’s overall growth of 6.6% during the same period.

The increase was not evenly distributed across age groups.

Barnet Council reported that residents aged 75 and over experienced the largest proportional growth between 2011 and 2021, at around 11%, representing approximately 2,700 additional people. The 20–74 age group increased by around 10%, while the 0–19 population increased by around 7%.

Barnet therefore combines population growth with population ageing.

The number of households also increased. The 2021 Census recorded 148,917 households, a rise of 9.6% from 2011.

This matters because population growth affects housing demand, schools, transport, healthcare, retail and public services.

Which parts of Barnet have contributed most to recent population growth?

Recent population growth is concentrated unevenly across Barnet, with higher densities in areas such as Grahame Park and Colindale and lower densities across places including Totteridge, reflecting differences in housing type, regeneration and available development land.

Barnet’s population is not distributed evenly across the borough.

The 2021 population density was approximately 4,489 people per square kilometre. Barnet Open Data identifies Grahame Park as having the highest population density, at about 13,360 people per square kilometre, while Totteridge and Barnet Gate had the lowest, at about 649 people per square kilometre.

This contrast illustrates the relationship between housing form and population density.

High-density estates and newer apartment developments accommodate more residents within smaller areas. Large houses, protected open land and lower-density suburban streets accommodate fewer residents over larger areas.

Colindale has been particularly important in the borough’s recent urban development. It contains large-scale residential regeneration and has shifted from a landscape containing industrial and institutional uses towards a denser residential district.

Grahame Park also demonstrates how post-war estate development contributed to population concentration.

Other neighbourhoods have followed different trajectories. Totteridge retains significant open space and lower-density housing, limiting the scale of population growth compared with more intensively developed areas.

For visitors, these demographic differences help explain Barnet’s varied urban landscape. A journey from Colindale to Totteridge can pass through noticeably different housing densities, street patterns and land uses within the same borough.

The borough’s demographic geography is therefore a product of both population demand and planning constraints.

Historical transport routes established the original settlement pattern. Later planning policies determined where additional homes could be built.

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How has migration changed Barnet’s population?

Migration has become an important component of Barnet’s demographic change, increasing the borough’s cultural diversity and altering its country-of-birth and ethnic composition alongside natural population change and the ageing of established communities.

Barnet has become increasingly diverse during the twenty-first century.

The 2021 Census recorded significant changes in the ethnic composition of the borough. The proportion identifying within the White ethnic group fell from 64.1% in 2011 to 57.7% in 2021. The Asian, Asian British or Asian Welsh category increased from 18.5% to 19.3%, while the Black, Black British, Black Welsh, Caribbean or African category increased from 7.7% to 7.9%. The Other ethnic groups category increased from 4.9% to 9.8%.

Country of birth data provides another measure of demographic change.

In 2021, approximately 55.4% of Barnet residents were born in England. Romania was the next most common recorded country of birth, accounting for around 3.4% of residents. India accounted for approximately 2.9%, while Iran also accounted for approximately 2.9%.

These changes reflect international migration, movement within the UK, different age structures and changing patterns of household formation.

Migration has also influenced local economic and cultural life. Barnet contains diverse food businesses, places of worship, community organisations, schools and commercial centres.

The demographic story is therefore broader than a simple increase in the number of residents.

Barnet has changed in size, age structure, household composition, ethnicity and country of birth.

These characteristics help explain why the borough has developed multiple distinct local identities rather than one uniform population.

As you explore the modern borough, you are crossing land with a deep heritage. Read about the full to understand its origins.

What does Barnet’s population growth mean for the future?

Barnet’s future population will depend on housing supply, regeneration, migration, ageing, household formation and planning constraints, while current projections indicate continued growth and increasing pressure on transport, infrastructure, services and residential development.

Population projections indicate that Barnet’s demographic expansion is continuing.

A Barnet strategic assessment based on population projections estimated a population of approximately 406,341 in 2025, rising to about 409,063 in 2026 and 417,573 by 2030 under the projection series used. These figures are projections rather than census counts and therefore should not be treated as equivalent to observed population totals.

More recent Barnet planning material also records continued population growth after the 2021 Census, while noting the distinction between census results and projections.

The implications extend across several areas.

Housing is one of the most important. More residents require additional homes, while existing housing stock needs adaptation as household structures and age profiles change.

Transport is another major factor. Barnet’s historic growth was strongly connected to railways, trams and the Underground. Future growth similarly depends on transport capacity and connectivity.

Schools and healthcare services must respond to changing population numbers and age structures. The growth of older residents increases demand for accessible housing, community services and healthcare provision. At the same time, more than 119,000 residents aged 0–24 were recorded in the 2021 Census, demonstrating the continuing importance of services for children and young people.

Urban development also faces geographical limits.

Barnet contains substantial open space and Green Belt land. Protecting these areas constrains outward expansion and increases the importance of brownfield development, regeneration and efficient use of existing urban land.

For visitors, demographic growth explains why Barnet has such a broad range of environments. Historic market streets, Victorian suburbs, inter-war estates, high-density regeneration areas, parks and protected landscapes all form part of the same borough.

For residents and businesses, the population story explains ongoing changes in demand for housing, transport, retail, employment space and community facilities.

Barnet’s demographic history is therefore a story of rural settlements becoming connected suburbs, suburbs becoming a metropolitan borough, and an established London borough continuing to evolve.

The central pattern is clear. Population growth followed accessibility, housing development, employment opportunities and London’s wider expansion. The strongest transformation occurred from the nineteenth century into the twentieth century, when railways, trams and Underground services turned settlements such as Hendon, Finchley and Edgware into major suburban communities.

By 2021, Barnet had 389,340 residents, making it the second-largest London borough by population. Its subsequent demographic direction combines continued growth with ageing and increasing diversity.

That combination makes population history essential to understanding modern North London. Barnet’s streets, neighbourhoods, transport routes and open spaces all reflect different stages of this long demographic expansion.