• county
  • FIPS 53031
  • Largest town: Port Townsend

Jefferson County, Washington

Jefferson County had 33,944 residents in the Census Vintage 2024 estimate, on 1,803.7 square miles of land. It ranks 27th of 39 in Washington by population and 18th by land area.

Population
33,944
#27 of 39 in Washington · #1,342 in US
Area
1,803.7 sq mi
#18 of 39 in Washington · #327 in US
Density
19 / sq mi
#29 of 39 in Washington · #2,284 in US
Median household income
$77,856
#13 of 39 in Washington · #549 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Jefferson County within Washington. Pin: Olympia.

Measure from here

Tools and pages that start from Jefferson County

Jefferson County population, land area and income

Jefferson County had 33,944 residents in the Census Vintage 2024 estimate, on 1,803.7 square miles of land. It ranks 27th of 39 in Washington by population and 18th by land area. That works out to 18.8 people per square mile, below the US average of 96.3, and below the national county median.

The median county-equivalent in Washington has 69,632 residents, so Jefferson County has 49% of the typical county's population.

Its SAIPE 2023 median household income of $77,856 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

33,944

3144th1st

1342nd of 3,144 (US)

Land area

1,804 sq mi

3144th1st

327th of 3,144 (US)

Density

18.8 / sq mi

3144th1st

2284th of 3,144 (US)

Median household income

$77,856

3143rd1st

549th of 3,143 (US)

Rank within Washington (39)

Population

33,944

39th1st

27th of 39 (WA)

Land area

1,804 sq mi

39th1st

18th of 39 (WA)

Density

18.8 / sq mi

39th1st

29th of 39 (WA)

Median household income

$77,856

39th1st

13th of 39 (WA)

How Jefferson County's population changed since 2020

Jefferson County gained 883 residents between the July 2020 and July 2024 estimates, a rise of 2.7%. That ranks 25th of 39 in Washington for growth. The median Washington county changed by +3.2%, and the state as a whole by +3.0%.

Since the April 2020 estimates base, Jefferson County recorded 657 births and 1,839 deaths, a natural change of -1,182. Net international migration added +164 and net domestic migration, people moving to or from other US counties, came to +2,052. The largest single component was domestic migration, which added 2,052 people.

33.1k202033.6k202133.6k202233.7k202333.9k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
657
Deaths
1,839
Net international migration
+164
Net domestic migration
+2,052
Change, July 2023 to July 2024
+219

Where Jefferson County is

The Census internal point of Jefferson County is at 47.805700, -123.527100. It sits in UTM zone 10N. The map shades Washington's 39 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Jefferson County outlined. Dots are towns of 1,000+ people with residents in it.

King County: +2.9%Thurston County: +2.3%Garfield County: +4.7%Adams County: +2.1%Kitsap County: +2.0%Mason County: +5.5%Stevens County: +5.2%Walla Walla County: -0.9%Whitman County: +1.2%Pierce County: +1.9%Benton County: +5.2%Columbia County: +1.8%Skamania County: +5.1%Douglas County: +6.4%Kittitas County: +2.9%Klickitat County: +5.7%Pacific County: +3.2%Grant County: +5.3%Grays Harbor County: +2.7%Jefferson County: +2.7%Lincoln County: +8.6%San Juan County: +4.7%Skagit County: +2.2%Island County: -0.6%Ferry County: +4.8%Chelan County: +2.4%Clark County: +4.3%Asotin County: +0.9%Franklin County: +4.2%Whatcom County: +3.3%Snohomish County: +4.1%Pend Oreille County: +6.1%Yakima County: +0.7%Clallam County: +0.8%Wahkiakum County: +7.9%Spokane County: +2.7%Okanogan County: +6.6%Cowlitz County: +2.7%Lewis County: +5.4%
Change 2020 to 2024
  1. < +1.9%
  2. < +2.7%
  3. < +4.2%
  4. < +5.3%
  5. ≥ +5.3%
no data

Orange pin: Jefferson County internal point. Dark pin: Olympia.

Internal point

Decimal
47.805700, -123.527100
DMS
47°48'20.52"N 123°31'37.56"W
UTM
10N 460533.4E 5294839.5N
Geohash
c22pvnf23
Plus code
84VRRF4F+75

Towns in Jefferson County

One incorporated place of 1,000+ people has residents in Jefferson County, 10,649 people together, or 31% of the county. Each figure counts only the part of the town inside Jefferson County; towns marked "part" extend into another county. The largest is Port Townsend with 10,649.

  1. 01Port Townsend10,649
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Jefferson County

The Census 2024 county adjacency file lists 6 neighbors for Jefferson County. The most populous is Kitsap County, WA, with 281,420 residents. Distances run between Census internal points in a straight line.

Distance to Olympia and the nearest big city

Olympia is 60.7 miles SSE of Jefferson County's internal point in a straight line. The nearest place of 100,000 or more is Seattle, WA (population 780,995), 56.2 miles away. The nearest place of 10,000 or more is Port Angeles, WA (population 20,112), 22.0 miles away.

Jefferson County FIPS code

The FIPS code of Jefferson County is 53031: state code 53 for Washington plus county code 031. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $77,856.

Questions people ask

What is the population of Jefferson County, Washington?

The Census Vintage 2024 estimate for July 1, 2024 is 33,944. That is up 883 people (2.7%) from the July 2020 estimate of 33,061.

What is the FIPS code of Jefferson County?

53031. The first two digits (53) are Washington; the last three (031) identify the county.

What is the largest town in Jefferson County?

Port Townsend, with 10,649 residents inside Jefferson County in 2024.

Which counties border Jefferson County?

6 county-equivalents border it in the Census 2024 adjacency file: Kitsap County, WA; Island County, WA; Clallam County, WA; Grays Harbor County, WA; Mason County, WA; San Juan County, WA.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.