The series consists of index "cards" (actually pre-printed forms with handwritten annotations) with data concerning the naturalization of foreign immigrants in Mississippi. The information was gathered from county circuit court records by employees of the U.S. Works Progress Administration between 1936 and 1941 as part of the Mississippi Historical Records Survey. Each form typically includes the following information: name of naturalization applicant; kind of proceeding; country of birth; date of arrival in U.S., port of entry, name and location of court, etc. Only twenty-seven counties are represented in this series: Amite, Attala, Clarke, Clay, Coahoma, Copiah, Franklin, Grenada, Harrison, Hinds, Holmes, Itawamba, Jones, Marshall, Montgomery, Neshoba, Noxubee, Oktibbeha, Panola, Pontotoc, Prentiss, Quitman, Sharkey, Sunflower, Tunica, Winston, and Yazoo. Images of the records were created in 2011 by FamilySearch from papers at MDAH and are arranged alphabetically by folder description.