Home / Places / South East / West Sussex ONS estimates show that the county council area's population rose by 112,321 residents (13.9%) between mid-2011 and mid-2025, from 808,919 to 921,240. Source: ONS MYE4 .
921,240 Residents, mid-2025 ONS MYE4 estimate 882,670 Residents, Census 2021 ethnicity table ONS TS021 county row 806,892 Residents, Census 2011 ONS KS201EW county row Ethnic groups in the county council area Census 2011
White British 88.9% White Other 4.8% Asian 3.5% Black 0.9% Mixed 1.5% Other 0.3% Census 2021
White British 84.2% White Other 6.8% Asian 4.3% Black 1.3% Mixed 2.4% Other 1.0% Published county counts. Changes are percentage points calculated from unrounded shares. Group 2011 2021 Change White British 717,551 743,568 -4.7pp White Other 38,948 59,948 +2.0pp Asian 28,334 38,288 +0.8pp Black 7,146 11,429 +0.4pp Mixed 12,155 20,811 +0.9pp Other 2,758 8,626 +0.6pp
How county and district counts relate County figures use the ONS county council row. Districts use their own published rows. Census 2021 counts include disclosure-control changes, so district figures may not add exactly to the county figure. The reconciliation table shows each difference. Census 2011 counts and annual population estimates agree exactly with the district sums.
The 2021 district total is 3 residents higher than the published county total. Both figures are retained as published. The ethnicity table's all-residents count is the denominator for every county ethnic group share.
ONS explains Census 2021 disclosure controls . The audit does not establish the precise cause of each individual difference.
Reconciliation: every county and district-sum comparison Difference means district sum minus published county count. Year and measure County District sum Difference 2011: All residents 806,892 806,892 0 2011: White British 717,551 717,551 0 2011: White Other 38,948 38,948 0 2011: Asian 28,334 28,334 0 2011: Black 7,146 7,146 0 2011: Mixed 12,155 12,155 0 2011: Other 2,758 2,758 0 2021: All residents 882,670 882,673 +3 2021: White British 743,568 743,567 -1 2021: White Other 59,948 59,947 -1 2021: Asian 38,288 38,295 +7 2021: Black 11,429 11,431 +2 2021: Mixed 20,811 20,807 -4 2021: Other 8,626 8,626 0
Raw source rows: KS201EW, 2011 , row 95. TS021, 2021 , row 152.
Download all county reconciliation records (CSV)
Annual county population estimates, 2011 to 2025 ONS MYE4. Every value agrees exactly with the sum of constituent districts. Year Residents 2011 808,919 2012 817,521 2013 825,301 2014 833,969 2015 842,534 2016 851,868 2017 859,537 2018 866,248 2019 871,740 2020 875,354 2021 885,048 2022 893,408 2023 904,579 2024 914,100 2025 921,240
Population change since 2011 Map: Population change since 2011, mid-2025 estimate. West Sussex: 7 district councils. Adur +5.7%; Arun +15.0%; Chichester +14.2%; Crawley +16.3%; Horsham +15.6%; Mid Sussex +16.7%; Worthing +8.4%. Adur: +5.7% Arun: +15.0% Chichester: +14.2% Crawley: +16.3% Horsham: +15.6% Mid Sussex: +16.7% Worthing: +8.4% Chichester +14.2% 130,224 people Horsham +15.6% 152,016 people Mid Sussex +16.7% 163,566 people Arun +15.0% 172,326 people Adur +5.7% 64,802 people ukdemographics.co.uk ukdemographics.co.uk UK Demographics Population data for every community 2025 Population change since 2011 West Sussex: 7 district councils ONS ESTIMATE −4 −1 +1 +4 +8 +12% Change in the estimated resident population at 30 June, compared with mid-2011. Source: ONS, Mid-Year Population Estimates, England and Wales, June 2025, table MYE4 (published 29 July 2026). Boundaries: ONS LAD (May 2026) BSC. Contains OS data © Crown copyright and database right 2026. ukdemographics.co.uk Every figure sourced. Map: Population change since 2011, mid-2025 estimate. West Sussex: 7 district councils. Adur +5.7%; Arun +15.0%; Chichester +14.2%; Crawley +16.3%; Horsham +15.6%; Mid Sussex +16.7%; Worthing +8.4%. Adur: +5.7% Arun: +15.0% Chichester: +14.2% Crawley: +16.3% Horsham: +15.6% Mid Sussex: +16.7% Worthing: +8.4% Chichester +14.2% 130,224 people Horsham +15.6% 152,016 people Mid Sussex +16.7% 163,566 people Arun +15.0% 172,326 people Crawley +16.3% 124,462 people Adur +5.7% 64,802 people Worthing +8.4% 113,844 people ukdemographics.co.uk ukdemographics.co.uk UK Demographics Population data for every community 2025 Population change since 2011 West Sussex: 7 district councils ONS ESTIMATE −4 −1 +1 +4 +8 +12% Change in the estimated resident population at 30 June, compared with mid-2011. Source: ONS, Mid-Year Population Estimates, England and Wales, June 2025, table MYE4 (published 29 July 2026). Boundaries: ONS LAD (May 2026) BSC. Contains OS data © Crown copyright and database right 2026. ukdemographics.co.uk Every figure sourced. ONS mid-year estimates. Councils A to Z. Council 2011 2025 Change Adur 61,334 64,802 +5.7% Arun 149,811 172,326 +15.0% Chichester 113,995 130,224 +14.2% Crawley 107,053 124,462 +16.3% Horsham 131,540 152,016 +15.6% Mid Sussex 140,188 163,566 +16.7% Worthing 104,998 113,844 +8.4%
Census 2021 ethnic groups Map: White British share of residents, Census 2021. West Sussex: 7 district councils. Adur 88.9%; Arun 88.7%; Chichester 90.1%; Crawley 61.8%; Horsham 88.1%; Mid Sussex 85.8%; Worthing 85.0%. England and Wales 2021: 74.4%. Adur: 88.9% Arun: 88.7% Chichester: 90.1% Crawley: 61.8% Horsham: 88.1% Mid Sussex: 85.8% Worthing: 85.0% Chichester 90.1% fell 2.9 points from 2011 Horsham 88.1% fell 4.0 points from 2011 Mid Sussex 85.8% fell 4.5 points from 2011 Arun 88.7% fell 3.0 points from 2011 ukdemographics.co.uk ukdemographics.co.uk UK Demographics Population data for every community 2021 White British share of residents West Sussex: 7 district councils CENSUS · OBSERVED 40 50 60 70 80 90% England and Wales 2011: 80.5% England and Wales 2021: 74.4% Share of usual residents in the White: English, Welsh, Scottish, Northern Irish or British group. Source: ONS Census 2011, table KS201EW. Boundaries: ONS LAD (May 2026) BSC. Contains OS data © Crown copyright and database right 2026. Share of usual residents in the White: English, Welsh, Scottish, Northern Irish or British group. Source: ONS Census 2021, table TS021; change from Census 2011, table KS201EW. Boundaries: ONS LAD (May 2026) BSC. Contains OS data © Crown copyright and database right 2026. ukdemographics.co.uk Every figure sourced. Map: White British share of residents, Census 2021. West Sussex: 7 district councils. Adur 88.9%; Arun 88.7%; Chichester 90.1%; Crawley 61.8%; Horsham 88.1%; Mid Sussex 85.8%; Worthing 85.0%. England and Wales 2021: 74.4%. Adur: 88.9% Arun: 88.7% Chichester: 90.1% Crawley: 61.8% Horsham: 88.1% Mid Sussex: 85.8% Worthing: 85.0% Chichester 90.1% fell 2.9 points from 2011 Horsham 88.1% fell 4.0 points from 2011 Mid Sussex 85.8% fell 4.5 points from 2011 Arun 88.7% fell 3.0 points from 2011 Crawley 61.8% fell 10.4 points from 2011 Adur 88.9% fell 4.0 points from 2011 Worthing 85.0% fell 4.4 points from 2011 ukdemographics.co.uk ukdemographics.co.uk UK Demographics Population data for every community 2021 White British share of residents West Sussex: 7 district councils CENSUS · OBSERVED 40 50 60 70 80 90% England and Wales 2021: 74.4% Share of usual residents in the White: English, Welsh, Scottish, Northern Irish or British group. Source: ONS Census 2011, table KS201EW. Boundaries: ONS LAD (May 2026) BSC. Contains OS data © Crown copyright and database right 2026. Share of usual residents in the White: English, Welsh, Scottish, Northern Irish or British group. Source: ONS Census 2021, table TS021; change from Census 2011, table KS201EW. Boundaries: ONS LAD (May 2026) BSC. Contains OS data © Crown copyright and database right 2026. ukdemographics.co.uk Every figure sourced. Each bar shows all six groups. Figures are observed Census 2021 shares; they are not projections.
White British 88.9% White Other 4.5% Asian 2.2% Black 0.8% Mixed 2.5% Other 1.1% White British 88.7% White Other 7.2% Asian 1.6% Black 0.5% Mixed 1.5% Other 0.6% White British 90.1% White Other 5.3% Asian 1.8% Black 0.6% Mixed 1.7% Other 0.5% White British 61.8% White Other 11.6% Asian 15.4% Black 4.5% Mixed 4.1% Other 2.7% White British 88.1% White Other 5.5% Asian 2.7% Black 0.9% Mixed 2.1% Other 0.6% White British 85.8% White Other 6.4% Asian 3.6% Black 0.9% Mixed 2.5% Other 0.8% White British 85.0% White Other 6.3% Asian 3.9% Black 1.1% Mixed 2.6% Other 1.0% Sources: ONS MYE4 population estimates, Census 2011 KS201EW and Census 2021 TS021. Boundaries: ONS Open Geography. Contains public sector information licensed under the Open Government Licence v3.0.
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