Wahkiakum County may refer to:
;Places
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Wahkiakum County, Washington
Wahkiakum County ( ) is a county located in the U.S. state of Washington. As of the 2020 census, the population was 4,422, making it one of the least populous counties in Washington. The county seat and only incorporated town is Cathlamet. T ...
;Ships
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USS ''Wahkiakum County'' (LST-1162), a United States Navy landing ship tank in commission from 1953 to 1970
*USNS ''Wahkiakum County'' (T-LST-1162), a United States Navy tank landing ship in non-commissioned service in the Military Sealift Command from 1972 to 1973 which had previously been in commission as
USS ''Wahkiakum County'' (LST-1162)
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