AN/SPQ-9A (sometimes pronounced as "spook nine") is a United States Navy multi-purpose surface search and fire control radar used with the Mk-86 gun fire-control system (MK86 GFCS).

It is intended primarily to detect and track targets at sea level, on the surface of the water for either gun fire engagement or navigation.

Initially tested on the USS Norton Sound (AVM-1), it was also deployed on Spruance-class destroyers, Kidd-class destroyers, Arleigh Burke-class destroyers, Ticonderoga-class cruisers, Tarawa-class amphibious assault ships, California-class cruisers, Virginia-class cruisers, and National Security Cutters of the United States Coast Guard.

It was fitted to the German Navy's Lütjens-class destroyers as part of the Type 103B upgrade in the 1980s.

The system is X-band and the antenna consists of dual planar arrays mounted back-to-back under a radome.