City in Snohomish County, Washington · 6.4 sq mi · 3,135 people per sq mi
19,987 people live in Monroe. The typical household earns $110,461, and the median resident is 35.7 years old.
2026 projection
From 19,699 in 2020
Poverty rate 7.32%
Men 35.5 · Women 36.3
1910–2026
19,987
2026 projection
1.5% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
1910–2026
19,987
2026 projection
1.5% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 19,987 | -38 | 0.19% |
|---|---|---|---|
| 2025 | 20,025 | +151 | 0.76% |
| 2024 | 19,874 | +332 | 1.70% |
| 2023 | 19,542 | +160 | 0.83% |
| 2022 | 19,382 | -409 | 2.07% |
| 2021 | 19,791 | +92 | 0.47% |
| 2020 | 19,699 | +641 | 3.36% |
| 2019 | 19,058 | +360 | 1.93% |
| 2018 | 18,698 | +444 | 2.43% |
| 2017 | 18,254 | +345 | 1.93% |
Showing 10 of 27 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
Monroe has a population change lower than Snohomish County, Washington, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 198 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 14 residents
50% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 50% | 47% | 53% |
| Never married | 34% | 41% | 25% |
| Divorced | 12% | 9% | 15% |
| Widowed | 4% | 2% | 7% |
| Separated | 1% | 2% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources