Linganore Creek is a 13.5-mile-long (21.7 km) tributary of the Monocacy River in Frederick County, Maryland. The stream is formed from the confluence of the north and south forks of the Linganore (39.4489911°N 77.2216489°W), about 10 miles (16 km) east-northeast of the city of Frederick. The creek runs roughly southwest to the Monocacy River, which drains to the Potomac River. The watershed area of the creek is 83.1 square miles (215 km²).