Bank branch directory
FI
First Interstate Bank Branches in Spearfish, South Dakota
First Interstate Bank has 2 detailed location pages in Spearfish.
Detailed location pages2
ZIP codes covered1
Location data updatedJuly 30, 2026
Branch map
First Interstate Bank locations in Spearfish
Locations
First Interstate Bank branches in Spearfish
Spearfish Lookout Mountain
311 N 27th St, Spearfish, South Dakota, 57783
Full-service branch · Opened November 14, 2005
Reported deposits · June 30, 2025$33.9M
Branch details and directions →
Spearfish Main
1400 North Ave, Spearfish, South Dakota, 57783
Full-service branch · Opened June 6, 1983
Reported deposits · June 30, 2025$149.2M
Branch details and directions →