Alva is part of Crook County, Wyoming. Alva is unincorporated, but the community does have a post office and a zip code. Alva is located next to the Black Hills National Forest. The forest is a popular camping and hiking spot in the area. Among the biggest companies in Alva are Hulett Hardware and the Corner Market. The biggest schools here are Dirks School and Wilson School. One of the best places to visit when you are in here is Devil's Tower, which is in close proximity to Alva.