USS Effective may refer to:
- USS Effective (AM-92), was launched 13 June 1942, reclassified PC-1596, 1 June 1944 and decommissioned 9 November 1945.
- USNS Effective (T-AGOS-21), was launched 26 September 1991 and is currently in service.
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.