Kirby is an unincorporated census-designated place in northern Pike County, Arkansas, United States. The community lies on U.S. Route 70; it is located halfway between Daisy and Glenwood. Per the 2020 census, the population was 721.
Public education for elementary and secondary school students is provided by the Kirby School District, which includes:
The schools' mascot and athletic teams are the Trojans with maroon and gray as the school colors.