
Cornwell Farm · National Register of Historic Places
Great Falls’s story
148 years in pictures
Potomac Canal Historic District is a National Historic Landmark, the National Register’s top tier.
Census counts: 6,945 in 1990, 15,953 in 2020. The archive holds 6 old photos and papers going back to 1861 and 5 maps from 1951 on.
9 places on the National Register of Historic Places.
- 1878Great Falls is settled
Explore the history →
Getting set upMoving to Great Falls: who provides what
Great Falls is unincorporated, so Fairfax 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 Sep 30, 2026.