Muskingum County Ohio
Muskingum County administrative offices are located at 401 Main Street, Zanesville, OH 43701; 740-455-7100.
The county was created in 1804. Zanesville, the county seat, became the State Capital due to some political maneuverings in 1810. After 2 years, the Capital was returned to Chillicothe (Ross County) and in 1816 moved permanently to Columbus (Franklin County).