County · Washington
San Juan County, Washington
San Juan County, Washington. San Juan County had 18,577 residents in 2025 by the Census Bureau's estimate, up 4.4% since 2020, faster than Washington (+3.8%). It holds 2 places (1 city, village or borough and 1 census-designated) and 9 census tracts. GEOID 53055.
Residents, July 2025 estimate
18,577
Census Bureau estimate (no margin published)
2020 Census count: 17,788 · ACS 2020-2024: 18,478
Median household income
$84,800
±$5,910 (90% margin)
Washington: $98,141
Median home value
$799,200
±$22,896 (90% margin)
Washington: $564,600
Median gross rent
$1,512
±$112 (90% margin)
Washington: $1,760
How many people live in San Juan County, and is it growing?
The 2020 Census counted 17,788 residents in San Juan County. The Census Bureau estimates 18,577 for July 1, 2025, up 4.4% since 2020, faster than Washington (+3.8%). The 2020-2024 American Community Survey puts the population at 18,478 over 174 square miles of land.
| Measure | San Juan County | Washington | Change since 2015-2019 |
|---|---|---|---|
| Total population | 18,478 | 7,816,116 | +1,690 |
| Households | 9,015±234 | 3,064,820 | +763 |
| Average household size | 2.03±0.05 | 2.50 | no clear change |
| Housing units | 13,990±81 | 3,306,620 | −129 |
San Juan County's population since 2000
From 14,077 in 2000 to 18,577 in 2025: up 32.0%. The 2000, 2010 and 2020 figures are census counts. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov
What cities and towns are in San Juan County?
San Juan County holds 2 places: 1 city, village or borough (an incorporated place) and 1 census-designated place. The largest is Friday Harbor with 2,729 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.
| Friday Harbor | 2,613 | $80,378 |
|---|---|---|
| Roche Harbor | 662 | $94,167 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov
Who lives in San Juan County?
The median resident of San Juan County is 57.0 years old; 12.6% are under 18 and 36.0% are 65 or older. The largest group is non-Hispanic white residents at 85.2%, then Hispanic or Latino residents (of any race) at 7.6%. 7.0% of residents were born outside the United States.
| Measure | San Juan County | Washington | Change since 2015-2019 |
|---|---|---|---|
| Median age | 57.0±0.4 | 38.3 | no clear change |
| Under 18 years | 12.6%±0.1 pts | 21.4% | – |
| 65 years and over | 36.0%±0.2 pts | 16.6% | – |
| Hispanic or Latino (any race) | 7.6% | 14.4% | +1.2 pts |
| White alone, not Hispanic | 85.2%±0.5 pts | 63.1% | −3.2 pts |
| Black or African American alone, not Hispanic | 0.2%±0.1 pts | 3.8% | −0.5 pts |
| Asian alone, not Hispanic | 1.3%±0.2 pts | 9.7% | no clear change |
| American Indian and Alaska Native alone, not Hispanic | 0.4%±0.1 pts | 0.8% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.2%±0.1 pts | 0.7% | – |
| Two or more races, not Hispanic | 4.6%±0.5 pts | 6.8% | – |
| Some other race alone, not Hispanic | 0.4%±0.2 pts | 0.6% | – |
| Born outside the United States | 7.0%±0.8 pts | 15.4% | no clear change |
| Speak a language other than English at home (age 5+) | 6.8%±0.9 pts | 21.4% | – |
| Civilian veterans (age 18+) | 7.5%±0.7 pts | 7.8% | – |
| With a disability | 12.8%±1.0 pts | 13.6% | – |
| No health insurance coverage | 6.0%±1.1 pts | 6.3% | no clear change |
| High school graduate or higher (age 25+) | 95.9%±0.8 pts | 92.3% | – |
| Bachelor's degree or higher (age 25+) | 53.9%±1.6 pts | 39.6% | +4.1 pts |
| Graduate or professional degree (age 25+) | 23.4%±1.4 pts | 15.6% | – |
| Moved from another state in the past year | 3.2%±0.8 pts | 2.9% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in San Juan County earn?
Half of San Juan County's 9,015 households earn less than $84,800 a year (±$5,910), against $98,141 in Washington. In 2015-2019 the median was $78,299 in 2024 dollars, so it rose by $6,501 after inflation. 11.3% of residents live below the poverty line.
| Measure | San Juan County | Washington | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $84,800±$5,910 | $98,141 | +$6,501 |
| Mean household income | $131,031±$7,035 | $134,588 | – |
| Per capita income | $63,950±$3,457 | $53,744 | +$7,613 |
| People below the poverty line | 11.3%±1.4 pts | 9.9% | no clear change |
| Children under 18 below the poverty line | 14.3%±4.4 pts | 11.6% | no clear change |
| Households receiving SNAP | 5.7%±1.1 pts | 11.5% | – |
| Households with a broadband subscription | 93.8%±1.1 pts | 93.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in San Juan County?
Owners occupy 78.0% of San Juan County's occupied homes and renters 22.0%. The median owner-occupied home is valued at $799,200 by its owner (±$22,896). The median renter pays $1,512 a month including utilities, and 36.5% of renters pay 35% or more of their income on rent.
| Measure | San Juan County | Washington | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $799,200±$22,896 | $564,600 | +$197,637 |
| Median gross rent | $1,512±$112 | $1,760 | +$281 |
| Renters paying 35% or more of income on rent | 36.5%±5.3 pts | 40.1% | no clear change |
| Median monthly owner costs, with a mortgage | $2,462±$72 | $2,445 | – |
| Owner-occupied homes | 78.0%±1.5 pts | 63.8% | +3.4 pts |
| Housing units | 13,990±81 | 3,306,620 | −129 |
| Homeowner vacancy rate | 0.6%±0.4 pts | 0.7% | – |
| Rental vacancy rate | 2.9%±1.7 pts | 4.5% | – |
| Single-family detached homes | 87.5%±0.9 pts | 61.9% | – |
| Mobile homes | 4.3%±0.7 pts | 5.5% | – |
| Built 2020 or later | 1.2%±0.3 pts | 2.3% | – |
| Built 1939 or earlier | 5.0%±0.7 pts | 9.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How many new homes is San Juan County building?
Builders took permits for 81 new housing units across San Juan County in 2025 (81 single-family), 4.4 per 1,000 residents.
Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in San Juan County get to work?
60.2% of San Juan County's workers drive alone and 22.7% work from home. The average trip to work takes 15.8 minutes. The unemployment rate in 2020-2024 averaged 3.7%.
| Measure | San Juan County | Washington | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 52.8%±1.1 pts | 64.5% | – |
| Unemployment rate | 3.7%±0.9 pts | 5.1% | +1.3 pts |
| Drove alone to work | 60.2%±2.7 pts | 63.4% | – |
| Carpooled | 7.6%±1.2 pts | 8.5% | – |
| Public transportation | 0.9%±0.3 pts | 3.4% | – |
| Walked | 5.8%±1.0 pts | 3.0% | – |
| Worked from home | 22.7%±2.3 pts | 19.8% | +9.3 pts |
| Mean travel time to work | 15.8 min±1.1 | 26.6 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What are San Juan County's census tracts?
San Juan County is divided into 9 census tracts. Among those with a reliable estimate, median household income runs from $71,528 (Tract 9605.01) to $97,703 (Tract 9601.01).
| Tract 9601.0153055960101 | 2,851±215 | $97,703 |
|---|---|---|
| Tract 9601.0253055960102 | 1,453±116 | $83,750 |
| Tract 9601.0353055960103 | 1,457±177 | $72,813 |
| Tract 9603.0153055960301 | 2,893±184 | $91,741 |
| Tract 9603.0253055960302 | 2,683±162 | $92,500 |
| Tract 960453055960400 | 3,678±171 | $81,435 |
| Tract 9605.0153055960501 | 1,809±185 | $71,528 |
| Tract 9605.0253055960502 | 1,654±181 | $76,667 |
| Tract 990153055990100 | 0±13 | not published |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov
How does San Juan County compare with Washington's other counties?
| Measure | Rank |
|---|---|
| Population | 32nd of 39 |
| Growth 2020-2025 | 20th of 39 |
| Residents per square mile | 11th of 39 |
| Median household income | 12th of 39 |
| Median home value | 2nd of 39 |
| Median gross rent | 11th of 39 |
| Poverty rate | 24th of 39 |
| Bachelor's degree or higher | 2nd of 39 |
| Median age | 2nd of 39 |
Source: PlainCities ranks from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for San Juan County are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.