Branch is a city in Franklin County, Arkansas, United States. It is part of the Fort Smith, Arkansas-Oklahoma Metropolitan Statistical Area. The population was 357 at the 2000 census.
According to the United States Census Bureau, Branch has a total area of 3.6 square miles (9.2 km²), all of it land.
As of the census of 2000, there were 357 people, 141 households, and 106 families residing in the city. The population density was 100.1 people per square mile (38.6/km²). There were 155 housing units at an average density of 43.5 per square mile (16.8/km²). The racial makeup of the city was 96.08% White, 1.68% Native American, 0.84% Asian, 0.56% from other races, and 0.84% from two or more races. 0.56% of the population were Hispanic or Latino of any race.