City in Boulder County, Colorado · 8 sq mi · 2,568 people per sq mi
About 20,000 people live in Louisville. The typical household earns $147,319, and the median resident is 42.6 years old.
2026 projection
From 21,205 in 2020
Poverty rate 4.52%
Men 40.2 · Women 44.6
1880–2026
20,468
2026 projection
3.5% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1880–2026
20,468
2026 projection
3.5% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 20,468 | -113 | 0.55% |
|---|---|---|---|
| 2025 | 20,581 | -173 | 0.83% |
| 2024 | 20,754 | +254 | 1.24% |
| 2023 | 20,500 | +2 | 0.01% |
| 2022 | 20,498 | -385 | 1.84% |
| 2021 | 20,883 | -322 | 1.52% |
| 2020 | 21,205 | +1,974 | 10.26% |
| 2019 | 19,231 | -230 | 1.18% |
| 2018 | 19,461 | +46 | 0.24% |
| 2017 | 19,415 | -128 | 0.65% |
Showing 10 of 30 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 208 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 22 residents
56% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 56% | 55% | 56% |
| Never married | 30% | 34% | 26% |
| Divorced | 9% | 8% | 10% |
| Widowed | 5% | 2% | 8% |
| Separated | <1% | 0% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau