Sumner, Washington Population 2026
Updated April 2026 · US Census ACS 2023 5-Year Estimates
The population of Sumner, Washington is 10,674 as of the 2023 American Community Survey, making it the 122nd-largest city in Washington. The median household income is $98,376, the median home value is $478,500, and the median age is 35.1.
The population has grown 15.4% since 2010 (9,435 → 10,885).
10,674
Population
1413
People / sq mi
$98,376
Median Income
$478,500
Median Home Value
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Sumner covers 7.6 sq mi of land at 1413 people per square mile.
About Sumner, WA
Homeownership is the standout figure in Sumner: 49.8% of homes are owner-occupied, lower than the national rate. With 10,674 residents, Sumner is a city in Washington.
Household earnings are middling, with a median of $98,376 — above the US median of $78,538. The poverty rate is 5.8%, below the national 12.4%. A typical home is worth $478,500, with typical rent around $1,886.
Fewer adults hold degrees here than in most comparable places — 23.5%, below the national 35.0%. Around 10.5% of workers work from home, below the national 14.0%, and the average commute runs about 30 minutes each way.
Sumner city Population History (2010-2024)
The city of Sumner city had a population of 9,435 in 2010 and 10,885 in 2024, a 15.4% growth over 14 years. The peak was 10,885 in 2024. Average annual growth rate: 1.03%.
10,885
Population (2024)
9,435
Population (2010)
10,885
Peak (2024)
1.03%
Avg Annual Growth
| Year | Population |
|---|---|
| 2010 | 9,435 |
| 2011 | 9,487 |
| 2012 | 9,526 |
| 2013 | 9,551 |
| 2014 | 9,628 |
| 2015 | 9,671 |
| 2016 | 9,947 |
| 2017 | 10,093 |
| 2018 | 10,165 |
| 2019 | 10,427 |
| 2020 | 10,661 |
| 2021 | 10,714 |
| 2022 | 10,632 |
| 2023 | 10,787 |
| 2024 | 10,885 |
Race & Ethnicity
| White | 79.9% |
| Black or African American | 1.0% |
| Asian | 0.0% |
| Hispanic or Latino (any race) | 6.6% |
| Two or More Races | 0.6% |
Economy & Income
$98,376
Median Household Income
$46,138
Per Capita Income
5.8%
Poverty Rate
3.9%
Unemployment Rate
Housing
$478,500
Median Home Value
$1,886
Median Rent
49.8%
Owner-Occupied
Education
91.2%
High School+
23.5%
Bachelor's+
Commute
1.5%
Drive Alone
73.7%
Public Transit
10.5%
Work From Home
30.2 min
Avg Commute
Community Profile
36.0%
Foreign Born
86.6%
Non-English at Home
8.2%
Veterans
11.9%
With Disability
91.4%
Health Insurance
97.9%
Internet Access
Employment by Industry
| Professional, Scientific & Management | 19.5% |
| Manufacturing | 12.3% |
| Construction | 11.9% |
| Retail Trade | 10.1% |
| Finance, Insurance & Real Estate | 10.1% |
| Education, Health Care & Social Services | 7.5% |
| Arts, Entertainment & Food Services | 4.4% |
| Information | 4.3% |
| Public Administration | 3.1% |
| Transportation & Warehousing | 1.8% |
Largest cities in Washington
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City rankings
Frequently Asked Questions
Sumner, Washington has a population of 10,674 according to the US Census Bureau's 2023 American Community Survey 5-year estimates, making it the 122nd-largest city in Washington.
The median household income in Sumner, Washington is $98,376, with 5.8% of residents living below the federal poverty level.
The median home value in Sumner, Washington is $478,500, with median monthly rent at $1,886 and a homeownership rate of 49.8%.
The median age in Sumner, Washington is 35.1 years. The population is 47.9% male and 52.1% female.
The population has grown 15.4% since 2010 (9,435 → 10,885).
Sumner city, WA Climate
Sumner city, WA has an average annual temperature of 10.6°C (51°F) and receives about 1110 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
10.6°C
Avg Temp
1110
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 4° / 39° | 148 mm |
| February | 5° / 42° | 119 mm |
| March | 7° / 45° | 110 mm |
| April | 9° / 49° | 91 mm |
| May | 13° / 55° | 63 mm |
| June | 16° / 60° | 54 mm |
| July | 18° / 65° | 28 mm |
| August | 19° / 65° | 34 mm |
| September | 16° / 60° | 52 mm |
| October | 11° / 52° | 89 mm |
| November | 7° / 44° | 164 mm |
| December | 4° / 39° | 158 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Sumner city, WA
The most comfortable months to visit Sumner city, WA are typically August, July and September, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 26°C high). The coldest is January (near 0°C low). November is usually the wettest month.
Where to stay near Sumner
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Data from the American Community Survey (ACS) 5-Year estimates.
Source: U.S. Census Bureau ACS, 2026.