Frost line depth in Summit County, OH
How deep the ground freezes in Summit County, OH
20 in. Dig to 20 in, just below the frost. Nearest NOAA station: Stow 4 Se, 4.5 mi.
Your building department sets the legal frost line depth (IRC Table R301.2(1)); footings must go below it (R403.1.4.1). Call them before you dig.