Towns and cities in City of Belfast by population
All 2 populated places in City of Belfast, ranked by current population. The largest is Belfast, with 348,005 people.
Every place in City of Belfast, ranked
Do not add these figures together to get City of Belfast's population. Settlement boundaries overlap, so the rows below sum to more than the area actually holds: 404,684 against an official 352,390. The ONS figure above is the one to quote. Why figures differ.
| # | Place | Population |
|---|---|---|
| 1 | Belfast | 348,005 |
| 2 | Castlereagh | 56,679 |
Common questions
What is the population of City of Belfast?
352,390, on the ONS mid-2024 estimate for Belfast. The individual towns listed on this page sum to more than that, because settlement boundaries overlap; the ONS figure is the one to quote for the area as a whole.
What is the largest town in City of Belfast?
Belfast, with 348,005 residents on current figures. This page ranks all 2 recorded places in City of Belfast by population, each linking to its own page with sources and, where held, a 2005 comparison.