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County · code 39007

Ashtabula CountyOhio

Ashtabula County is in Ohio, with its seat in Jefferson. It was created on June 7, 1808, from Geauga and Trumbull counties and named after the Ashtabula River.

  • Founded1808
  • County seatJefferson
  • Named forAshtabula River, Ohio
  • Land area702 sq mi + 666 sq mi water
  • Population97,574 2020 Census
  • Parcels mapped74,713 checked 14 October 2026
Open the free map Click any parcel in Ashtabula County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

LakeGeaugaTrumbullCrawford, PAErie, PA Jefferson Census outline · seat marked

Where it is

Ashtabula on the map of Ohio

Ohio has 88 counties and county equivalents, each with its own records office. Shapes with a page are links.

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Counties of Ohio · Ashtabula highlighted

History

Formed in 1808 from Geauga County and Trumbull County

An old deed may name a county that no longer exists, or a boundary that has since moved.

When first created in 1808, Ashtabula was not fully organized and its parts were attached to Geauga and Trumbull for administration and justice. In 1809, Ashtabula lost territory to Trumbull but remained attached to Geauga for these purposes. By 1811, Ashtabula gained territory from Trumbull and became fully organized and independent. In 1827, the county's limits were extended north to Lake Erie.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1808
    Ashtabula County created Ashtabula created from Geauga and Trumbull; Ashtabula not fully organized, parts attached to Geauga and Trumbull for administrative and judicial purposes.
    from Geaugafrom Trumbull
    · Ohio Laws 1807, 6th assy., ch. 1, secs.1, 3, 5-7/pp. 3-5; Chase, 3:ch. 362/p. 2105
  2. 1809
    Lost territory Ashtabula lost to Trumbull that part of Ashtabula that was attached to Trumbull; Ashtabula attached to Geauga for administrative and judicial purposes.
    to Trumbullto Geauga
    · Ohio Laws 1808, 7th assy., ch. 19/p. 143; Chase, 3:ch. 375/p. 2110
  3. 1811
    Gained territory Ashtabula gained from Trumbull; Ashtabula fully organized, detached from Geauga.
    from Trumbullfrom Geauga
    · Ohio Laws 1810, 9th assy., ch. 21/p. 42; Chase, 3:ch. 388/p. 2115
  4. 1827
    Gained territory Ashtabula gained non-county area over the waters of Lake Erie as its limits were extended to the northern boundary of Ohio. · Ohio Laws 1826, 25th assy., gen., p. 99; Chase, 3:ch. 456/p. 2142
  5. 1835
    Boundary clarified Northern boundary of Ashtabula was redefined to match the northern limit of Ohio in Lake Erie (no change).
    no change
    · Ohio Laws 1834, 33d assy., loc., secs. 1, 3-5/pp. 92-93

Land and parcels

What the maps cover in Ashtabula

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Ashtabula by the Census

Population
97,574 2020 Census count
Housing units
46,237 2020 Census count
Land area
702 square miles
Water area
666 square miles · 49% of the county, including large bodies of water
People per sq mi
139 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Ashtabula County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

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Questions

Common questions about Ashtabula County

When was Ashtabula County founded?
Ashtabula County was founded in 1808, formed from Geauga County and Trumbull County, and named after Ashtabula River, Ohio.
What is the county seat of Ashtabula County?
The county seat of Ashtabula County is Jefferson.
Is there an online parcel map for Ashtabula County?
Yes. Ohio Geographically Referenced Information Program (OGRIP, Ohio DAS) statewide compilation of county auditor parcels publishes a parcel map of 74,713 parcels, rated fallback here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Ashtabula County's boundary or name changed?
Ashtabula County was created in 1808 from Geauga County and Trumbull County. Since then the Atlas of Historical County Boundaries records 3 later changes, chiefly involving Geauga County and Trumbull County.
Is my lot in a flood zone?
We do not have flood maps for Ashtabula County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door