Wareham St Martin is a civil parish in the English county of Dorset. The parish spreads across a large, and mostly rural area to the north of the town of Wareham including much of Wareham Forest. However the town of Wareham lies within its own civil parish, and the only significant settlement within Wareham St. Martin parish is the village of Sandford on the A351 road between Wareham and Poole. The parish also includes the Holton Heath trading estate.