Wahkiakum County may refer to:
- Places
- Ships
- 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)