# 9.1 million Londoners, by age

> Nine million people, arranged by the year they were born.

- Category: People
- Cadence: census
- Status: Published on a census cadence.
- Dataset key: `population`
- Source: [ONS](https://www.ons.gov.uk/)
- Licence: Open Government Licence v3.0 — [terms](https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/)
- Canonical page: [https://londongraph.com/g/londoners-by-age](https://londongraph.com/g/londoners-by-age)
- Machine-readable record: [https://londongraph.com/data/londoners-by-age](https://londongraph.com/data/londoners-by-age)

## Methodology

Mid-year population estimates for Greater London from NOMIS, the ONS statistics service. Single years of age are fetched and bucketed into decades here, because aggregate age codes vary between NOMIS datasets while single years always mean what they say. Bars are scaled to the largest band rather than to an absolute axis.

## Visualisations

- [Overview](https://londongraph.com/g/londoners-by-age): Nine million people, arranged by the year they were born.
- [Age composition](https://londongraph.com/g/londoners-by-age?view=composition): Compare the contribution of every age band.

## Citation guidance

Attribute the original publisher named above and identify LondonGraph as the visualisation and methodology layer. Do not describe live values as a historical census, and do not present placeholder values as observations.