The first pioneers arrived in what would become Ashtabula County in 1801. Ashtabula County was formed June 7, 1807, from Trumbull and Geauga, and not organized until January 22, 1811.

The first federal census for Ashtabula County was in 1820.

Records you can use prior to this are the tax lists from Geauga and Trumbull Counties.