Population estimates

Estimates of the population by age and sex are provided for a range of geographies (e.g. output area, ward, district, CCG, county, region, and country). These are usually updated in June each year by the Office for National Statistics for the previous year (e.g. mid-2015 estimates were released in June 2016), with sub-national population estimates released later in the year.

These estimates have been collated by the Public Health and Social Research Unit for the geographies within West Sussex.

In 2015, 836,300 people were estimated to be resident in West Sussex.

This was nearly 8,000 more than in 2014, an increase of approximately 1%.

In 2015 there were 8,882 births, 9,385 deaths. Net internal migration (from/to elsewhere in the UK) was 5,541; net international migration was 2,440. This means that population increase resulted from, in the main, net internal migration.

Of the quinary age groups, the largest year‐on‐year change was in the 70‐74 years age group, where there were 1,751 more people than 2014; an increase of 4.3%

Use the links below to access files for each geography

Please note: we are currently updating the West Sussex JSNA site so please check back soon for updates.


Briefing – 2015 Population Estimates

Date Added: 30/01/2017

Briefing - 2015 Population Estimates

This short briefing contains 2015 mid year estimates of the population in West Sussex.

Each year the ONS release an estimate of the resident population in England and Wales.
Data are available at county and local authority level and relate to the mid‐point of the previous year (i.e. data released in June 2016 provide an estimate of mid‐year 2015). Data are released once a year, are provided by gender and individual age group and information is also released on the “components of change”, i.e. births, deaths and migration. Small area estimates (wards, MSOAs, LSOAs) are released separately, later in the year.

Download: Briefing - 2015 Population Estimates

West Sussex and District population district 1981 to 2013

Date Added: 12/08/2014

West Sussex and District population district 1981 to 2013

Office for National Statistics (ONS) population estimates by 5 year age group and sex for West Sussex and constituent districts for each year 1981 to 2013.

Data are provided in a tabular format to enable filtering for district and year of interest.

Download: West Sussex and District population district 1981 to 2013

2012 mid year estimates of population briefing note

Date Added: 09/08/2013

2012 mid year estimates of population briefing note

The 2012 Mid-year population estimate for West Sussex was 815,100. This is a 0.8% increase from the previous year, caused by inward migration and to some extent a higher number of births than deaths.

This briefing outlines the key features of the 2012 population estimate including total population estimate and breakdown by 5-year age groups. Comparison between the 2011 and 2012 population estimates shows the changes in the number of births, death and net migration over that time period.

Download: 2012 mid year estimates of population briefing note