Travilah is a United States census-designated place and an unincorporated area in Montgomery County, Maryland. It is 17.28 square miles (44.8 km2) located along the north side of the Potomac River, and surrounded by the communities of Potomac, North Potomac, and Darnestown—all census-designated places. It had a population of 11,985 as of the 2020 census.Within the Travilah census-designated place at the intersection of what are now Travilah Road and Glen Road, the small rural community of Travilah existed in the late 1800s and early 1900s. The community had its own post office, general store, school, town hall, church, and a few homes. The crossroads was popular with area farmers because it was close to the Chesapeake and Ohio Canal (C&O Canal) and at least two mills. The name Travilah comes from Travilah Clagett, who was the community's first postmaster in 1883.
In 2000, the United States Census Bureau began recognizing the area around the original Travilah crossroads community as a census designated place. Much of this tranquil community is simply large homes on large tracts of land with numerous parks and nature preserves mixed in. The community is within driving-distance of Washington, D.C., and the I-270 Technology Corridor. Travilah has a median household income of about $235,000.