
Marion County Courthouse and Sheriff's House · National Register of Historic Places
Fairmont’s story
207 years in pictures
Census counts: 683 in 1850, a peak of 29,346 in 1950, 18,416 in 2020. The archive holds 17 old photos and papers going back to 1802 and 5 maps from 1902 on.
16 places on the National Register of Historic Places.
Explore the history →
Getting set upMoving to Fairmont: who provides what
Who provides power, water and the rest in Fairmont, and how to reach them.
The full setup list →EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Aug 3, 2026.