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Kansas City, 
United States
344,125 people lived in Kansas City in 2025. It is the 1663rd largest of the world's 12,138 cities, and the 57th largest in the United States.
This is the UN's built-up area, drawn from satellite pictures and census maps rather than from the city limits, and the two can be a long way apart. The rule behind it.
Verified 2026-09-30 · 73 canaries
People · every five years · 1975 to 2050
How Kansas City grew
Where Kansas City had 10 people in 1975, it had 59.3 in 2025.
On the UN's projection it will have 384,366 people in 2050. It passed 250,000 people between 2010 and 2015.
projected (after 2025) · how sure the UN is: high moderate low
How to read this: each column is one of the UN's five-yearly estimates, 1975 through 2050, and taller means more people. Where a column is hatched the year has not happened yet. The strip under the columns is the UN's own confidence in each figure, palest where it is least sure; where it is blank the city was not on the list at all.
People · your family's years · 1975 to 2050
Kansas City through your family’s years
Put in the years your family were born. You’ll see how many people lived in Kansas City in each of those years, and when each of them turned 30.
United States · every city · 2025
Where it is
How to read this: Kansas City is the dot in colour with a ring around it. The grey dots are the other cities of the United States in 2025, 348 in all, led by New York City, each drawn with an area that matches its people. Countries next door are outlines only.
Area and built-up land · km²
How much land it covers
In 2025, Kansas City covered 180 km², and buildings, roads and other built-up land covered 40 km² of it. That is 117 m² of built-up land for each person, about a square 11 by 11 metres. Since 1975, its built-up land has grown to 6.2 times its size, and its people are 5.9 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 Kansas City, which is 344,125 people.
How to read this: 1,000 squares, one for every 1,000th person in the United States; the coloured squares live in Kansas City. 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
- 1659 Jamalpur Bangladesh345,132
- 1660 Dili Timor-Leste345,038
- 1661 Guankou China344,468
- 1662 Augsburg Germany344,255
- 1663 Kansas City344,125
- 1664 Etah India344,002
- 1665 Banda Aceh Indonesia343,382
- 1666 Dongying China343,003
- 1667 Kaili China342,989
In the United States, 2025
- 1569 Mission Viejo365,221
- 1597 Memphis356,215
- 1606 McAllen355,331
- 1618 Oak Ridge353,212
- 1663 Kansas City344,125
- 1779 Buffalo322,892
- 1780 Parma322,420
- 1843 Arlington311,130
- 1845 Modesto310,818
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 Kansas City are the UN's own, at five-year steps: an estimate for each of 1975 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 Kansas City 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