
Patterson Viaduct Ruins · National Register of Historic Places
Catonsville’s story
195 years in pictures
Its 16 National Register listings are more than in 96% of Maryland towns with a listing.
Census counts: 37,872 in 1960, 44,701 in 2020. The archive holds 12 old photos and papers going back to 1880 and 6 maps from 1894 on.
- 1831Catonsville is settled
Explore the history →
Getting set upMoving to Catonsville: who provides what
Catonsville is unincorporated, so Baltimore County and regional agencies provide most services.
EPA SDWIS (Oct 9, 2026) · HIFLD + EIA-861 2025 · Census 2020 ZCTAs · NCES 2024–25 · registration: vote.gov, updated Mar 11, 2026.