Byhalia (bye-HAY-lee-uh) is a town in Marshall County, Mississippi, United States. The population was 706 as of the 2000 census.
According to the United States Census Bureau, the town has a total area of 2.9 square miles (7.4 km²), all of it land.
The town of Byhalia was founded in 1838 when C.W. Rains and Wash Poe purchased land at the intersection of Pigeon Roost Road (now Church Street) and the Collierville-Chulahoma Road (now Highway 309). Pigeon Roost Road was originally the Chickasaw Trail, the route followed by Hernando DeSoto in 1541. Pigeon Roost Road had been improved in 1835 to accommodate the removal of the Chickasaw Nation to Oklahoma.