Skagit County, Washington

Skagit County at a glance.

Skagit County had an estimated 132,736 residents in July 2024, the 11th most populous of Washington's 39 counties, up 2.5% since the 2020 census. Of those, 105,672 are 18 or older, the voting-age population, and 23.6% are 65 or older. Its 90,782 active registered voters equal about 85.9% of that voting-age population.

It covers 1,730 square miles of land (77 people per square mile), and 39.6% of residents live outside any incorporated city or town. The largest cities and towns are Mount Vernon (35,344), Anacortes (18,148), Sedro-Woolley (13,215), Burlington (10,945) and La Conner (994). The American Community Survey (2020-2024) puts it at a median age of 42.1, a median household income of $89,263, 30.2% of adults 25 and older holding a bachelor's degree or higher and 70.1% of occupied homes owned by the people living in them.

In 2024, 69,837 votes were cast for president, about 66.1% of the voting-age population; the Democratic ticket took 52.9% and the Republican ticket 44.1%. The two-party margin moved from D+9.6 in 2008 to D+8.8 in 2024.

Population (2024 estimate)

132,736

Population (2020 census base)

129,518

Voting-age population (18+)

105,672

Active voters per 100 adults

85.9

Residents 65 and older

23.6%

People per square mile

77

Living outside incorporated places

39.6%

Land area

1,730 sq mi

Median age

42.1

Median household income

$89,263

Adults 25+ with a bachelor's degree

30.2%

Owner-occupied homes

70.1%

Largest cities and towns

1. Mount Vernon 35,344
2. Anacortes 18,148
3. Sedro-Woolley 13,215
4. Burlington 10,945
5. La Conner 994

Presidential vote, 2008–2024

Sources: U.S. Census Bureau Vintage 2024 population estimates and 2024 Gazetteer; American Community Survey 2020–2024 5-year estimates; certified county presidential returns. Growth, density and turnout are simple arithmetic on those figures.