Data / Population density / Niagara County

Population density in Niagara County

Population density in Niagara County was 154.4 inhabitants per km² in 2025, according to the U.S. Census Bureau. That is down 0.2% from 2024. That is the 17th highest of 62 counties in 2025.

2025, inhabitants per km²154.4
Change on 2024-0.2%
Rank17th of 62Counties in New York ranked
Series high156.82020
Series low154.42025

Population density in Niagara County, 2020 to 2025

CSVChart (SVG)

1541551551561561571572020202120222023202420252020: 156.8 inhabitants per km²2021: 156.5 inhabitants per km²2022: 155.5 inhabitants per km²2023: 154.8 inhabitants per km²2024: 154.8 inhabitants per km²2025: 154.4 inhabitants per km²
inhabitants per km². Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09, published 2026-03-26.
All 6 values
Periodinhabitants per km²
2025154.4
2024154.8
2023154.8
2022155.5
2021156.5
2020156.8

Compared with New York and United States

Place2025
Niagara County154.4
New York163.9
United States37.3

Rankings

Definition

Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.

United States: Census Bureau population estimates for 1 July divided by land area (water excluded) from the latest Census Gazetteer files. US tables often give people per square mile; multiply persons per km² by 2.59 to compare.

How to cite

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.

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Questions

What is the population density in Niagara County?

Population density in Niagara County was 154.4 inhabitants per km² in 2025, according to the U.S. Census Bureau. That is down 0.2% from 2024. That is the 17th highest of 62 counties in 2025.

Where does this figure come from?

U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². Retrieved by Invokely on 2026-10-09.

What was the highest population density in Niagara County?

156.8 inhabitants per km² in 2020, the highest value since 2020 in this series.

More statistics for Niagara County

All statistics for Niagara County