| Official Name: | St. George Island, Maryland |
| Settlement Type: | Census-designated place |
| Pushpin Map: | Maryland#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Maryland |
| Subdivision Type2: | County |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 2.41 |
| Area Land Km2: | 2.04 |
| Area Water Km2: | 0.37 |
| Area Total Sq Mi: | 0.93 |
| Area Land Sq Mi: | 0.79 |
| Area Water Sq Mi: | 0.14 |
| Population As Of: | 2020 |
| Population Total: | 265 |
| Population Density Km2: | 129.79 |
| Population Density Sq Mi: | 336.29 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Coordinates: | 38.12°N -76.4836°W |
| Blank Name: | FIPS code |
| Blank Info: | 24-69425 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 594921 |
St. George Island is an unincorporated census-designated place in St. Mary's County, Maryland, United States. The post office at Piney Point serves the island, which is connected to the mainland by a short bridge. During the War of 1812, the British made the island their headquarters, and raided shipyards and river plantations from this base. Many tall pines on the island were cut and shipped to England for ship masts.[2] In the 19th century the Roman Catholic Church, which owned the island, finally opened it to settlement, including some settlers who migrated from Smith Island.
On 17 July 1776, St. George Island, Maryland was the site of a battle in the American Revolutionary War where British forces under the command of John Murray, 4th Earl of Dunmore attempted to land on the mainland in Maryland.[3] Maryland's Flying Camp militia under the command of Captain Rezin Beall, who was wounded in action in this battle, repulsed the invading British, preventing the invasion of the mainland.[3]