
Delaware County Courthouse · National Register of Historic Places
Delaware’s story
218 years in pictures
Its 24 National Register listings are more than in 96% of Ohio towns with a listing.
Census counts: 200 in 1810, 41,302 in 2020. The archive holds 6 old photos and papers going back to 1904 and 4 maps from 1924 on.
Explore the history →
Getting set upMoving to Delaware: who provides what
Who provides power, water and the rest in Delaware, 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.