When was Walla Walla County founded?

Walla Walla County was founded in 1854, formed from Skamania County and Whatcom County, and named after Walla Walla people.

What is the county seat of Walla Walla County?

The county seat of Walla Walla County is Walla Walla.

Is there an online parcel map for Walla Walla County?

Yes. Walla Walla County publishes a parcel map of 31,112 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.

Has Walla Walla County's boundary or name changed?

Walla Walla County was created in 1854 from Skamania County and Whatcom County. Since then the Atlas of Historical County Boundaries records 13 later changes, chiefly involving Stevens County, Klickitat County and Columbia County.

Is my lot in a flood zone?

We do not have flood maps for Walla Walla County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

County · code 53071

Walla Walla CountyWashington

Walla Walla County is a county in Washington, with its seat in Walla Walla. It was formed on April 25, 1854, from Skamania and Whatcom counties.

Founded1854
County seatWalla Walla
Named forWalla Walla people
Land area1,270 sq mi + 29 sq mi water
Population62,584 2020 Census
Parcels mapped31,112 checked 15 October 2026

Open the free map Click any parcel in Walla Walla County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated 20 October 2026

Census outline · seat marked

History

Formed in 1854 from Skamania County and Whatcom County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Walla Walla County was created by Washington Territory on April 25, 1854, from Skamania and Whatcom counties, and initially included parts of present Idaho and Montana. Boundary disputes with Whatcom County were settled in 1858, and the county lost territory to the creation of Spokane County in 1858 and Stevens County in 1863. When Washington became a state in 1889, Walla Walla County continued as an established county.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

1854
Walla Walla County created Walla Walla created by Washington Territory from Skamania and Non-County Area 1; included parts of present Idaho and Montana. Walla Walla overlapped the eastern end of Whatcom (see Overlap Area 1).
from Skamania from Whatcom
25 April 1854 · Wash. Terr. Laws 1854, 1st sess., pp. 472-473
1858
Lost territory Walla Walla lost to creation of Spokane (original, extinct).
to Spokane
29 January 1858 · Wash. Terr. Laws 1857, 5th sess., p. 51
1859
Lost territory Walla Walla lost to creation of Klickitat.
to Klickitat
20 December 1859 · Wash. Terr. Laws 1859, 7th sess., p. 420
1861
Gained territory Walla Walla gained all of Non-County Area 1, lost to Klickitat. Non-County Area 1 eliminated.
from Klickitat
31 January 1861 · Wash. Terr. Laws 1860, 8th sess., p. 59
1889
Became part of Washington Walla Walla continued as a Washington county when the state of Washington admitted to the Union and Washington Territory eliminated. 11 November 1889 · U.S. Stat., vol. 25, ch. 180[1889], p. 676; U.S. Stat. pres. proc., vol. 26[1889], p. 10; Van Zandt, 155-156

Show all 15 changes (10 more)

1854
Walla Walla County created Walla Walla created by Washington Territory from Skamania and Non-County Area 1; included parts of present Idaho and Montana. Walla Walla overlapped the eastern end of Whatcom (see Overlap Area 1).
from Skamania from Whatcom
25 April 1854 · Wash. Terr. Laws 1854, 1st sess., pp. 472-473
1858
Changed Overlap Area 1, between Walla Walla and Whatcom, settled in favor of Whatcom.
Whatcom
14 January 1858 · Wash. Terr. Laws 1857, 5th sess., p. 53
1858
Lost territory Walla Walla lost to creation of Spokane (original, extinct).
to Spokane
29 January 1858 · Wash. Terr. Laws 1857, 5th sess., p. 51
1859
Lost territory Walla Walla lost to creation of Klickitat.
to Klickitat
20 December 1859 · Wash. Terr. Laws 1859, 7th sess., p. 420
1861
Gained territory Walla Walla gained all of Non-County Area 1, lost to Klickitat. Non-County Area 1 eliminated.
from Klickitat
31 January 1861 · Wash. Terr. Laws 1860, 8th sess., p. 59
1863
Lost territory Walla Walla lost to creation of Stevens.
to Stevens
20 January 1863 · Wash. Terr. Laws 1862, 10th sess., p. 6
1863
Lost territory Walla Walla lost to creation of Ferguson (extinct).
to Ferguson
23 January 1863 · Wash. Terr. Laws 1862, 10th sess., pp. 4-5
1865
Gained territory Walla Walla gained from Ferguson (extinct) when the act to create Ferguson was repealed.
from Ferguson
18 January 1865 · Wash. Terr. Laws 1864-1865, 12th sess., p. 47
1865
Lost territory Walla Walla lost to creation of Yakima, lost to Stevens.
to Yakima to Stevens
21 January 1865 · Wash. Terr. Laws 1864-1865, 12th sess., pp. 47-48
1867
Gained territory Walla Walla gained from Yakima, lost to creation of Non-County Areas 3 and 4. Overlap Area 2 was created between Stevens and Walla Walla when both counties were redefined.
from Yakima from Stevens
31 January 1867 · Wash. Terr. Laws 1866-1867, 14th sess., p. 50
1868
Gained territory Walla Walla gained all of Non-County Area 4, lost to Klickitat. Overlap Area 2, between Stevens and Walla Walla, settled in favor of Stevens; Non-County Area 4 and Overlap Area 2 eliminated.
from Klickitat from Stevens
18 January 1868 · Wash. Terr. Laws 1867, 1st biennial sess., p. 60
1869
Boundary clarified Walla Walla redefined (no change).
no change
2 December 1869 · Wash. Terr. Laws 1869, 2nd biennial sess., sec. 1/p. 297
1875
Lost territory Walla Walla lost to creation of Columbia.
to Columbia
11 November 1875 · Wash. Terr. Laws 1875, 5th biennial sess., pp. 133-135
1879
Gained territory Walla Walla gained from Columbia.
from Columbia
13 November 1879 · Wash. Terr. Laws 1879, 7th biennial sess., p. 226
1889
Became part of Washington Walla Walla continued as a Washington county when the state of Washington admitted to the Union and Washington Territory eliminated. 11 November 1889 · U.S. Stat., vol. 25, ch. 180[1889], p. 676; U.S. Stat. pres. proc., vol. 26[1889], p. 10; Van Zandt, 155-156

Land and parcels

What the maps cover in Walla Walla

Who publishes each layer, how good it is, and when we last checked.

Parcels Good enough

Lot lines and tax-map numbers for 31,112 parcels from Walla Walla County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 28 September 2026 · checked 15 October 2026
Address points Missing

No public address points layer found for Walla Walla County yet.
Buildings Reference

Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026

Official: from the office that keeps the record
Good enough: a reliable statewide or national copy
Fallback: a guide only; check the official record
Missing: nothing public found yet

People and land

Walla Walla by the Census

Population

62,584 2020 Census count

Housing units

24,971 2020 Census count

Land area

1,270 square miles

Water area

29 square miles

People per sq mi

49 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Zoning and code

Walla Walla County Codefrom library.municode.com

County government

County government
The official website of Walla Walla County.
co.walla-walla.wa.us

See your own lot on these maps

Open Walla Walla County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

Open the free map no sign-in Pro early access

Questions

Common questions about Walla Walla County

When was Walla Walla County founded?: Walla Walla County was founded in 1854, formed from Skamania County and Whatcom County, and named after Walla Walla people.
What is the county seat of Walla Walla County?: The county seat of Walla Walla County is Walla Walla.
Is there an online parcel map for Walla Walla County?: Yes. Walla Walla County publishes a parcel map of 31,112 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Walla Walla County's boundary or name changed?: Walla Walla County was created in 1854 from Skamania County and Whatcom County. Since then the Atlas of Historical County Boundaries records 13 later changes, chiefly involving Stevens County, Klickitat County and Columbia County.
Is my lot in a flood zone?: We do not have flood maps for Walla Walla County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby