Provo, SD

ZIP code 57774 serves Porcupine, an unincorporated community on the Pine Ridge Indian Reservation in southwestern South Dakota. Notable local landmarks include Porcupine Butte, a prominent natural feature, and the Thunder Valley Community Development Corporation campus, which provides community programs and housing initiatives. The surrounding area is part of Oglala Lakota County’s rural reservation landscape, with homes and community facilities linked by local roads.