| Official Name: | Big Pool, 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 |
| Subdivision Name2: | Washington |
| Unit Pref: | Imperial |
| Area Footnotes: | [1] |
| Area Total Km2: | 0.28 |
| Area Land Km2: | 0.28 |
| Area Water Km2: | 0.00 |
| Area Total Sq Mi: | 0.11 |
| Area Land Sq Mi: | 0.11 |
| Area Water Sq Mi: | 0.00 |
| Population As Of: | 2020 |
| Population Total: | 78 |
| Population Density Km2: | 279.51 |
| Population Density Sq Mi: | 722.22 |
| Timezone: | Eastern (EST) |
| Utc Offset: | -5 |
| Timezone Dst: | EDT |
| Utc Offset Dst: | -4 |
| Elevation Ft: | 443 |
| Coordinates: | 39.6239°N -78.0156°W |
| Area Codes: | 301, 240 |
| Blank Name: | FIPS code |
| Blank Info: | 24-07375 |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 2583583 |
Big Pool is an unincorporated community and census-designated place in western Washington County, Maryland, United States. Its population was 82 as of the 2010 census.[2] It is between Clear Spring, Maryland and Hancock, Maryland along Interstate 70 and is officially a part of the Hagerstown Metropolitan Area.
To the south of Big Pool lies Fort Frederick State Park, a restored fort used during the French and Indian War. Also nearby is the Chesapeake and Ohio Canal National Historical Park, which lies near Ft. Frederick alongside the Potomac River.Big Pool is also the name of a large body of water which is part of the Chesapeake and Ohio Canal. This pool occurs roughly at the 113 mile mark, and it is on what the canallers called the 14 mile level.