Census Data

Colchester: NS-SeC

Location Type: Built Up Areas, ONS Geographic Code: E63004104

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Key Facts

All Residents 135,188
Male 66,223
Female 68,946
Households 55,306

The ONS doesn't publish census data directly for Built Up Areas. The figures on this page are aggregated from census areas contained within Colchester. They may not, therefore, be precisely accurate. Age-standardised statistics and population density are not available for aggregated datasets.

Table Codets062
Unit of MeasurePerson
Number of Response Options10

This dataset provides Census 2021 estimates that classify usual residents aged 16 years and over in England and Wales by National Statistics Socio-economic Classification (NS-SEC). The estimates are as at Census Day, 21 March 2021.


The National Statistics Socio-economic Classification (NS-SEC) indicates a person's socio-economic position based on their occupation and other job characteristics.

It is an Office for National Statistics standard classification. NS-SEC categories are assigned based on a person's occupation, whether employed, self-employed, or supervising other employees.

Full-time students are recorded in the "full-time students" category regardless of whether they are economically active.

Quality Statement

As Census 2021 was during a unique period of rapid change, take care when using this data for planning purposes.
Read more in our Labour market quality information for Census 2021 methodology.

National Statistics Socio-economic Classification (NS-SEC): Total: All usual residents aged 16 years and over 108,560
L1, L2 and L3 Higher managerial, administrative and professional occupations 13,517
L4, L5 and L6 Lower managerial, administrative and professional occupations 23,048
L7 Intermediate occupations 12,437
L8 and L9 Small employers and own account workers 10,272
L10 and L11 Lower supervisory and technical occupations 5,485
L12 Semi-routine occupations 13,240
L13 Routine occupations 10,892
L14.1 and L14.2 Never worked and long-term unemployed 7,190
L15 Full-time students 12,479

These values are calculated by adding up the values for census output areas contained within Colchester. They may, therefore, be slightly inaccurate due to administrative boundaries not precisely aligning with census boundaries.

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