Sidney Population 2026
Sidney has a population of 20,858, making it the #2277 biggest city in 🇺🇸 United States, located in Ohio. It is about 422× smaller than New York City, the country's biggest city.
Population (city proper)
20,858
Rank in United States
#2277
Coordinates
40.28°N, 84.16°W
~290 m elevation · America/New_York
Distance to capital (Washington)
629 km
391 miles, straight line
Other big cities in Ohio
Cities near Sidney
- Piqua20,790 people · ~17 km away
- Troy25,659 people · ~28 km away
- Huber Heights38,176 people · ~49 km away
- Springfield59,680 people · ~50 km away
- Lima37,873 people · ~51 km away
- Fairborn33,452 people · ~53 km away
FAQ
What is the population of Sidney?
Sidney has a population of 20,858 (city proper, latest official figure via GeoNames), making it the #2277 biggest city in United States.
What state is Sidney in?
Sidney is located in Ohio, United States.
Is Sidney the capital of United States?
No, the capital of United States is Washington D.C., about 629 km away.
Sources & notes
Population refers to the city proper (municipal boundaries), not the metropolitan area. Source: GeoNames (CC BY 4.0), retrieved 2026-07-07. Country data: UN World Population Prospects 2024.
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