
Adena (Thomas Worthington House) · National Register of Historic Places
Chillicothe’s story
223 years in pictures
Adena (Thomas Worthington House) is a National Historic Landmark, the National Register’s top tier.
Census counts: 2,426 in 1820, 22,059 in 2020. The archive holds 12 old photos and papers going back to 1812 and 5 maps from 1906 on.
15 places on the National Register of Historic Places.
- 1803Chillicothe is settled
Explore the history →
Getting set upMoving to Chillicothe: who provides what
Who provides power, water and the rest in Chillicothe, 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.