Topics
Arlington, 
United States
311,130 people lived in Arlington in 2025. It is the 1843rd largest of the world's 12,138 cities, and the 60th largest in the United States.
The UN measures every city in the world the same way, by where the buildings are rather than where the boundary runs, so this figure and Arlington's own can differ widely. What counts as a city here.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Arlington grew
Count 10 people in Arlington in 1995 and the same count gives 53 in 2025.
On the UN's projection it will have 373,569 people in 2050. It passed 250,000 people between 2010 and 2015. The UN first counts it as a city in 1995, when it passed 50,000 people.
projected (after 2025) · how sure the UN is: high moderate low
How to read this: read it left to right, 1975 to 2050, one column every five years, the height being people. Hatching marks the projected years. Below, a strip of the UN's confidence: strong colour where the census maps are recent and detailed, pale where they are not, blank where the place was not counted as a city.
People · your family's years · 1975 to 2050
Arlington through your family’s years
Put in the years your family were born. You’ll see how many people lived in Arlington in each of those years, and when each of them turned 30.
United States · every city · 2025
Where it is
How to read this: the United States and its 348 cities in 2025, each a dot whose area is its number of people (the largest is New York City). Arlington is ringed, in colour; the other cities are grey. Neighbouring countries are outlines.
Area and built-up land · km²
How much land it covers
In 2025, Arlington covered 128 km², and buildings, roads and other built-up land covered 30 km² of it. That is 97 m² of built-up land for each person, about a square 10 by 10 metres. Since 1995, its built-up land has grown to 4.9 times its size, and its people are 5.3 times as many.
How to read this: each pale square is the city's whole area, the strong square inside it the part that is built on; one scale for all three, so a bigger square is more land. Hatched is the UN's projection.
Of every 100 people in the United States
Its share of the United States
Of every 1,000 people in the United States in 2025, 1 lived in Arlington, which is 311,130 people.
How to read this: 1,000 squares, one for every 1,000th person in the United States; the coloured squares live in Arlington. The grey rest live in other cities, in towns or in the countryside.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 1839 Vizianagaram India312,315
- 1840 Holguín Cuba312,173
- 1841 Simri Bakhtiarpur India311,434
- 1842 Oshawa Canada311,294
- 1843 Arlington311,130
- 1844 Rouen France311,071
- 1845 Modesto310,818
- 1846 Pachuca Mexico310,805
- 1847 Brno Czechia310,796
In the United States, 2025
- 1618 Oak Ridge353,212
- 1663 Kansas City344,125
- 1779 Buffalo322,892
- 1780 Parma322,420
- 1843 Arlington311,130
- 1845 Modesto310,818
- 1903 Hammond301,148
- 1934 Arlington Heights298,081
- 1996 Louisville291,103
How to read this: the number before each name is its place among all 12,138 cities in the world in 2025; bars are people, on one scale per list. Only cities that reach 300,000 people have a page here, so a gap in the numbers is a smaller city.
Apparatus
Sources and method
The figures for Arlington are the UN's own, at five-year steps: an estimate for each of 1995 to 2025, then projection to 2050. Projected years are drawn hatched, and the UN publishes no range of uncertainty for a city. What a city means here, how the UN measures one, and why that number can differ from the one Arlington publishes about itself: how the figures here are put together.
Sources: UN WUP 2025 · Natural Earth · flag-icons. Every source, its licence and how to cite it →
Verified 2026-09-30 · 73 canaries