St. Martin's River

The St. Martin's River is a tributary of Isle of Wight Bay in Worcester County, Maryland. Approximately 5 mi long, it drains the northernmost part of Worcester County.

A short river, the St. Martin's broadens rapidly to enter Isle of Wight Bay where the bay is crossed by Maryland Route 90. Most of the river is a tidal estuary. Its two main tributaries are the Bishopville Prong and the Shingle Landing Prong.

The St. Martin's forms the northern boundary of Ocean Pines, Maryland; Bishopville, Maryland is on the Bishopville Prong of the river.