20 entries match your criteria. Historical Markers in Columbia County, Washington Clickable Map of Columbia County, Washington and Immediately Adjacent Jurisdictions image/svg+xml 2019-10-06 U.S. Census Bureau, Abe.suleiman; Lokal_Profil; HMdb.org; J.J.Prats/dc:title> https://commons.wikimedia.org/wiki/File:Usa_counties_large.svg Columbia County, WA (20) Franklin County, WA (8) Garfield County, WA (4) Walla Walla County, WA (33) Whitman County, WA (2) Umatilla County, OR (69) Wallowa County, OR (20) ColumbiaCounty(20) Columbia County (20) FranklinCounty(8) Franklin County (8) GarfieldCounty(4) Garfield County (4) WallaWallaCounty(33) Walla Walla County (33) WhitmanCounty(2) Whitman County (2) UmatillaCountyOregon(69) Umatilla County (69) WallowaCounty(20) Wallowa County (20) Dayton is the county seat for Columbia CountyAdjacent to Columbia County, Washington Franklin County (8) ► Garfield County (4) ► Walla Walla County (33) ► Whitman County (2) ► Umatilla County, Oregon (69) ► Wallowa County, Oregon (20) ► Touch name on this list to highlight map location.Touch blue arrow, or on map, to go there. GEOGRAPHIC SORTTitle SortMarker Number SortMarker Number Sort NMarker Number Sort TPublication Order Sort Publication Order Sort AErected Year SortMost Viewed SortMost Recent-Interest SortMost Recently Changed SortSEE FAQ #33 FOR DESCRIPTIONS 1 ► Washington, Columbia County, Dayton — "a good road" — 2 ► Washington, Columbia County, Dayton — "encamped on the N. side" — 3 ► Washington, Columbia County, Dayton — "Good things from the Garden, — Garden in the Valley, Valley of the Jolly Ho Ho Ho! Green Giant " — 4 ► Washington, Columbia County, Dayton — Cayuse, Umatilla, and Walla Walla Homeland — 5 ► Washington, Columbia County, Dayton — City of Dayton — Early History — 6 ► Washington, Columbia County, Dayton — Columbia County — Historical Points of Interest — 7 ► Washington, Columbia County, Dayton — Columbia County Courthouse — 8 ► Washington, Columbia County, Dayton — Dodge Quarantine Cabin — 9 ► Washington, Columbia County, Dayton — Kendall Skyline Road — 10 ► Washington, Columbia County, Dayton — Kendall Skyline Road — 11 ► Washington, Columbia County, Dayton — Kimooenim Creek Lunch Site — 12 ► Washington, Columbia County, Dayton — Oldest Existing Depot in the State of Washington — 13 ► Washington, Columbia County, Dayton — On The Lewis and Clark Trail — 14 ► Washington, Columbia County, Dayton — Patit Creek Campsite — Columbia County, Washington — 15 ► Washington, Columbia County, Dayton — Patit Creek Campsite — Silhouette Legend — 16 ► Washington, Columbia County, Dayton — Railroad Track Park — 17 ► Washington, Columbia County, Dayton — Smith Hollow Schoolhouse — Paid Advertisement 18 ► Washington, Columbia County, Dayton — The Celilo Falls Trail — 19 ► Washington, Columbia County, Dayton — The Giant on the Hill — 20 ► Washington, Columbia County, Starbuck — M - R Military Road —