Caldwell is a city in St. Francis County, Arkansas, United States. The population was 555 at the 2010 census, an increase from 465 in 2000.Caldwell is located at 3504?28?N 9048?34?W? / ?35.074569N 90.809510W? / 35.074569; -90.809510.According to the United States Census Bureau, the town has a total area of 7.8km, of which 7.8km is land and 0.1km is water.As of the census of 2000, there were 465 people, 174 households, and 140 families residing in the town. The population density was 59.6/km. There were 190 housing units at an average density of 24.4/km. The racial makeup of the town was 82.80% White, 15.05% Black or African American, 0.43% Native American, 1.51% Asian, and 0.22% from two or more races. 0.65% of the population were Hispanic or Latino of any race.There were 174 households out of which 35.6% had children under the age of 18 living with them, 70.7% were married couples living together, 8.6% had a female householder with no husband present, and 19.