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People
Statistics · City
Population of the urban area in Nampa
1975 – 2025 · 11 data points
Updated Oct 22, 2026
Source: European Commission JRC — GHSL Urban Centre Database, 1975 – 2025
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Overview
7 figures
People
21 figures
Economy
20 figures
Housing
8 figures
Education
10 figures
Tourism
3 figures
Climate
3 figures
Latest value · 2025
85,369
+7.9%
since 2020
First value · 1975
27,938
since 2015
+19%
+2.3% a year on average
Population of the urban area, 1975 – 2025 people · Nampa
85,369
2025
Source: European Commission JRC — GHSL Urban Centre Database, 1975 – 2025
The series at a glance Nampa · 1975 – 2025
Latest value
85,369 · 2025
First value
27,938 · 1975
Highest
85,369 · 2025
Lowest
27,938 · 1975
Average change
+2.3% a year on average
Data points
11
By year
All years · 1975 – 2025
| Year | Nampa | Change |
|---|---|---|
| 2025 | 85,369 | +7.9% |
| 2020 | 79,119 | +10% |
| 2015 | 71,601 | +8.9% |
| 2010 | 65,725 | +20% |
| 2005 | 54,722 | +21% |
| 2000 | 45,197 | +15% |
| 1995 | 39,242 | +19% |
| 1990 | 32,904 | +0.2% |
| 1985 | 32,826 | +3.9% |
| 1980 | 31,609 | +13% |
| 1975 | 27,938 |
Source: European Commission JRC — GHSL Urban Centre Database, 1975 – 2025
What it means
How many people live in the built-up city as a whole, regardless of municipal borders.
How it is calculated
Satellite maps of buildings and census data are combined into a 1 km grid; the continuous dense area of at least 50,000 people is the urban centre. Every five years from 1975; 2030 is a projection.
People
Statistics: Nampa
Population
2M
2025 · Idaho
Population growth
0.52%
2025 · United States
Population density
9.5
2025 · Idaho
Size of the urban area
52
2025
Density of the urban area
1,642
2025
Median age
38.9
2024 · United States
Children under 15
18.9%
2024 · Idaho
Children under 18
22.0%
2024 · United States
Residents 65 and over
16.6%
2021 · Idaho
Life expectancy
78.4
2022 · Idaho
Births per woman
1.63
2024 · United States
Birth rate
10.6
2024 · United States