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Sincelejo, 
Colombia
295,401 people lived in Sincelejo in 2025. It is the 1964th largest of the world's 12,138 cities, and the 19th largest in Colombia.
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 Sincelejo grew
Count 10 people in Sincelejo in 1975 and the same count gives 39.2 in 2025.
On the UN's projection it will have 325,059 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: one column every five years, 1975 to 2050; its height is the number of people. Hatched columns are the UN's projection. The thin strip beneath says how sure the UN is of each figure: the stronger the colour, the surer. A blank means the place was not on the UN's list of cities that year.
People · your family's years · 1975 to 2050
Sincelejo through your family’s years
Put in the years your family were born. You’ll see how many people lived in Sincelejo in each of those years, and when each of them turned 30.
Colombia · every city · 2025
Where it is
How to read this: Colombia and its 81 cities in 2025, each a dot whose area is its number of people (the largest is Bogotá). Sincelejo 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, Sincelejo covered 28 km², and buildings, roads and other built-up land covered 7.7 km² of it. That is 26 m² of built-up land for each person, about a square 5 by 5 metres. Since 1975, its built-up land has grown to 2.1 times its size, and its people are 3.9 times as many.
How to read this: the outer pale square stands for all the land the city covers, and the solid square inside it for the part with buildings, roads and the like on it. All three squares share a scale, so you can compare them by eye. A hatched one is a year the UN has projected.
Of every 100 people in Colombia
Its share of Colombia
Of every 1,000 people in Colombia in 2025, 6 lived in Sincelejo, which is 295,401 people.
How to read this: shrink Colombia to 1,000 people and this is what you get. The coloured squares are the ones who would live in Sincelejo; the grey ones are everybody else, in other cities, in towns and out in the country.
Ranked by people · 2025
Cities of a similar size
In the world, 2025
- 1959 Wonosobo Indonesia295,758
- 1960 Colima Mexico295,757
- 1962 Ségou Mali295,589
- 1963 Pinghu China295,531
- 1964 Sincelejo295,401
- 1965 Barinas Venezuela295,298
- 1966 Hechuan China295,189
- 1967 Wardha India295,117
- 1968 Yanjiao China294,943
In Colombia, 2025
- 1537 Pasto371,637
- 1685 Montería339,380
- 1716 Neiva333,744
- 1802 Armenia319,234
- 1964 Sincelejo295,401
- 2058 Chía282,679
How to read this: names are in order of size, the leading number being each city's rank among all 12,138 in 2025; the bars share a scale within a list. A jump in the ranks means a city under 300,000 people, which is not given a page here.
Apparatus
Sources and method
The figures for Sincelejo 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 Sincelejo 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