Detail of release

This release contains Census 2021 estimates for the out-of-term population.

The out-of-term population is the usually resident population, counted at their out-of-term address if they have one. As a result, the difference relates to the location of some students and schoolchildren. This is different to other Census 2021 estimates, which placed students and schoolchildren at their term-time address.

Read more information on estimates of students in Census 2021 on the ONS website.

The downloads on this page package all the data for a dataset as a single zip file. Each zip file contains separate CSV files for each geographic layer. The zip file also contains a metadata XLS file. Please note to open CSV files in Excel the number of rows within the dataset must not exceed 1 million.

All out-of-term population datasets

• All out-of-term population datasets [196.0 MB zip]

Out-of-term population datasets

• OT001 - Population density of the out of term-time population (size: 1.4 MB)
• OT002 - Out of term-time population by legal partnership status (size: 7.5 MB)
• OT003 - Out of term-time population by sex by five-year age bands (size: 32.0 MB)
• OT004 - Out of term-time population by sex by single year of age (size: 6.4 MB)
• OT005 - Out of term-time population by ethnic group (size: 19.0 MB)
• OT006 - Out of term-time population by country of birth (detailed) (size: 2.5 MB)
• OT007 - Out of term-time population by main language (detailed) (size: 291.0 KB)
• OT008 - Out of term-time population by Welsh language skills (speaking) (size: 2.6 MB)
• OT009 - Out of term-time population by Welsh language skills (writing) (size: 2.6 MB)
• OT010 - Out of term-time population by Welsh language skills (reading) (size: 2.5 MB)
• OT011 - Out of term-time population by Welsh language skills (understanding) (size: 2.6 MB)
• OT012 - Out of term-time population by Welsh language skills (detailed) (size: 7.5 MB)
• OT013 - Out of term-time population by religion (size: 8.3 MB)
• OT014 - Out of term-time population by passports held (detailed) (size: 2.0 MB)
• OT015 - Out of term-time population by provision of unpaid care (size: 5.0 MB)
• OT016 - Out of term-time population by general health (size: 5.5 MB)
• OT017 - Out of term-time population by highest level of qualification (size: 11.0 MB)
• OT018 - Out of term-time population by economic activity status (size: 21.0 MB)
• OT019 - Out of term-time population by economic activity status (full-time students) (size: 9.2 MB)
• OT020 - Out of term-time population by hours worked (size: 5.3 MB)
• OT021 - Out of term-time population by industry (size: 19.0 MB)
• OT022 - Out of term-time population by occupation (Minor Groups) (size: 4.0 MB)
• OT023 - Out of term-time population by NS-SEC (size: 17.0 MB)
• OT024 - Out of term-time population by length of residence in the UK (size: 5.5 MB)

Protecting personal data

Sometimes we need to make changes to data if it is possible to identify individuals. This is known as statistical disclosure control. In Census 2021, we:

• Swapped records (targeted record swapping), for example, if a household was likely to be identified in datasets because it has unusual characteristics, we swapped the record with a similar one from a nearby small area. Very unusual households could be swapped with one in a nearby local authority.
• Added small changes to some counts (cell key perturbation), for example, we might change a count of four to a three or a five. This might make small differences between tables depending on how the data are broken down when we applied perturbation.

Read more in Section 5 of our article Design for Census 2021.

More information

Data not included in this release can be requested as similar outputs through the commissioned table service, for a charge. The creation of ad hoc tables is constrained by the data, by the availability of skilled staff to compile them, by any similarities to what the ONS has already released or plans to release, and the need to protect confidentiality of individuals. More information is available on the ONS website.

More information on results from Census 2021 is available on the Office for National Statistics website.

If you have any questions about Census 2021 out-of-term population products, contact:

Census Customer Services
ONS
Titchfield
Fareham
Hants
PO15 5RR

Telephone: +44 (0)1329 444972
E-mail: census.customerservices@ons.gov.uk