Flat Rock, Ohio

Flat Rock
census-designated place
Flat Rock Location within the state of Ohio
Coordinates: 41°14′09″N 82°51′37″W / 41.23583°N 82.86028°W / 41.23583; -82.86028Coordinates: 41°14′09″N 82°51′37″W / 41.23583°N 82.86028°W / 41.23583; -82.86028
Country	United States
State	Ohio
County	Seneca
Township	Thompson
Time zone	Eastern (EST) (UTC-5)
• Summer (DST)	EDT (UTC-4)
ZIP codes	44828

Flat Rock is a census-designated place in northeastern Thompson Township, Seneca County, Ohio, United States. Although it is unincorporated, it has a post office, with the ZIP code of 44828.

Flat Rock was originally called Lewisville, and under the latter name was platted in 1841. A post office called Flat Rock has been in operation since 1846. The present name comes from a flat layer of rock covering an artesian aquifer.

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