Lexa is a town in Phillips County, Arkansas, United States. The population was 286 at the 2010 census.
Lexa is located at 34°35′51″N 90°45′2″W (34.597528, -90.750430).
According to the United States Census Bureau, the city has a total area of 0.4 square miles (1.0 km2), all land.
As of the census of 2000, there were 331 people, 132 households, and 97 families residing in the city. The population density was 879.8 people per square mile (336.3/km2). There were 139 housing units at an average density of 369.5/sq mi (141.2/km2). The racial makeup of the city was 71.90% White, 26.28% Black or African American, 0.60% Native American, and 1.21% from two or more races.
There were 132 households, out of which 34.1% had children under the age of 18 living with them, 53.0% were married couples living together, 17.4% had a female householder with no husband present, and 26.5% were non-families. 25.8% of all households were made up of individuals, and 17.4% had someone living alone who was 65 years of age or older. The average household size was 2.51 and the average family size was 2.98.