
City National Bank Building · National Register of Historic Places
Mason City’s story
176 years in pictures
Its 40 National Register listings are more than in 94% of Iowa towns with a listing.
Census counts: 1,183 in 1870, 27,338 in 2020. The archive holds 14 old photos and papers going back to 1907 and 2 maps from 1959 on.
- 1850Mason City is settled
Explore the history →
Getting set upMoving to Mason City: who provides what
Who provides power, water and the rest in Mason City, 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 Nov 18, 2024.