• county
  • FIPS 39123
  • Largest town: Port Clinton

Ottawa County, Ohio

Ottawa County had 39,692 residents in the Census Vintage 2024 estimate, on 254.7 square miles of land. It ranks 62nd of 88 in Ohio by population and 86th by land area.

Population
39,692
#62 of 88 in Ohio · #1,196 in US
Area
254.7 sq mi
#86 of 88 in Ohio · #2,897 in US
Density
156 / sq mi
#34 of 88 in Ohio · #679 in US
Median household income
$76,582
#15 of 88 in Ohio · #597 in US

Census Vintage 2024 estimates · SAIPE 2023 income · 2024 Gazetteer land area

Ottawa County within Ohio. Pin: Columbus.

Measure from here

Tools and pages that start from Ottawa County

Ottawa County population, land area and income

Ottawa County had 39,692 residents in the Census Vintage 2024 estimate, on 254.7 square miles of land. It ranks 62nd of 88 in Ohio by population and 86th by land area. That works out to 155.8 people per square mile, 1.6 times the US average of 96.3, and in the top quarter nationally.

The median county-equivalent in Ohio has 58,250 residents; Ottawa County is somewhat smaller.

Its SAIPE 2023 median household income of $76,582 is in the top quarter among 3,143 counties with an estimate.

National rank among 3,144

Population

39,692

3144th1st

1196th of 3,144 (US)

Land area

255 sq mi

3144th1st

2897th of 3,144 (US)

Density

155.8 / sq mi

3144th1st

679th of 3,144 (US)

Median household income

$76,582

3143rd1st

597th of 3,143 (US)

Rank within Ohio (88)

Population

39,692

88th1st

62nd of 88 (OH)

Land area

255 sq mi

88th1st

86th of 88 (OH)

Density

155.8 / sq mi

88th1st

34th of 88 (OH)

Median household income

$76,582

88th1st

15th of 88 (OH)

How Ottawa County's population changed since 2020

Ottawa County lost 606 residents between the July 2020 and July 2024 estimates, a drop of 1.5%. That ranks 73rd of 88 in Ohio for growth. The median Ohio county changed by -0.2%, and the state as a whole by +0.7%.

Since the April 2020 estimates base, Ottawa County recorded 1,186 births and 2,518 deaths, a natural change of -1,332. Net international migration added +81 and net domestic migration, people moving to or from other US counties, came to +580. The largest single component was natural change, which removed 1,332 people.

40.3k202040.2k202140.0k202239.8k202339.7k2024
Census Vintage 2024 county estimates for July 1 of each year. The axis starts above zero so year-to-year changes are visible.

Components of change, April 2020 to July 2024

Births
1,186
Deaths
2,518
Net international migration
+81
Net domestic migration
+580
Change, July 2023 to July 2024
-127

Where Ottawa County is

The Census internal point of Ottawa County is at 41.545500, -83.012600. It sits in UTM zone 17N. The map shades Ohio's 88 county-equivalents by population change from 2020 to 2024, darker for faster growth, with Ottawa County outlined. Dots are towns of 1,000+ people with residents in it.

Shelby County: -0.4%Defiance County: +1.0%Darke County: -0.8%Seneca County: -0.6%Wood County: +0.6%Fayette County: -0.7%Clark County: -0.7%Hocking County: -2.2%Jackson County: +0.2%Miami County: +2.7%Richland County: -0.1%Union County: +13.7%Auglaize County: -1.2%Hancock County: +0.1%Morgan County: -1.6%Van Wert County: -0.1%Hardin County: -1.0%Paulding County: -0.3%Portage County: +1.2%Delaware County: +10.6%Harrison County: -3.1%Ross County: -1.3%Crawford County: -0.9%Clinton County: -0.0%Henry County: -0.5%Pike County: -0.0%Cuyahoga County: -1.7%Highland County: +1.0%Knox County: +1.7%Ottawa County: -1.5%Huron County: -0.6%Erie County: -2.2%Holmes County: +1.0%Lawrence County: -4.0%Marion County: -0.6%Fairfield County: +5.2%Putnam County: -0.6%Guernsey County: -0.5%Vinton County: -2.1%Gallia County: -1.2%Trumbull County: -0.7%Wayne County: -0.2%Perry County: +0.6%Ashland County: -0.1%Fulton County: -1.4%Brown County: +1.4%Lucas County: -1.1%Stark County: -0.1%Medina County: +1.1%Belmont County: -2.4%Williams County: -1.4%Mahoning County: -1.0%Noble County: +1.1%Greene County: +2.5%Preble County: -0.5%Allen County: -1.2%Athens County: +1.3%Jefferson County: -2.0%Adams County: +0.8%Monroe County: -2.3%Washington County: -2.2%Logan County: -0.1%Franklin County: +2.4%Warren County: +5.3%Wyandot County: -2.1%Licking County: +3.4%Hamilton County: +0.8%Clermont County: +2.6%Butler County: +2.2%Coshocton County: +1.1%Geauga County: -0.0%Sandusky County: -0.0%Ashtabula County: -0.6%Carroll County: -0.9%Tuscarawas County: -1.2%Morrow County: +2.7%Montgomery County: +0.1%Mercer County: +0.3%Lake County: -0.1%Pickaway County: +6.0%Madison County: +3.8%Muskingum County: +0.1%Meigs County: -3.0%Columbiana County: -1.8%Lorain County: +2.7%Scioto County: -2.8%Champaign County: +0.4%Summit County: -0.3%
Change 2020 to 2024
  1. < -1.4%
  2. < -0.6%
  3. < -0.0%
  4. < +1.1%
  5. ≥ +1.1%
no data

Orange pin: Ottawa County internal point. Dark pin: Columbus.

Internal point

Decimal
41.545500, -83.012600
DMS
41°32'43.80"N 83°00'45.36"W
UTM
17N 332136.2E 4601271.4N
Geohash
dpkur50h4
Plus code
86HRGXWP+6X

Towns in Ottawa County

4 incorporated places of 1,000+ people have residents in Ottawa County, 12,262 people together, or 31% of the county. Each figure counts only the part of the town inside Ottawa County; towns marked "part" extend into another county. The largest is Port Clinton with 5,915.

  1. 01Port Clinton5,915
  2. 02Oak Harbor2,790
  3. 03Genoa2,186
  4. 04Elmore1,371
Census Vintage 2024 subcounty estimates, county parts of incorporated places (SUMLEV 157).

Counties bordering Ottawa County

The Census 2024 county adjacency file lists 4 neighbors for Ottawa County. The most populous is Lucas County, OH, with 426,291 residents. Distances run between Census internal points in a straight line.

Distance to Columbus and the nearest big city

Columbus is 109.4 miles S of Ottawa County's internal point in a straight line. The nearest place of 100,000 or more is Toledo, OH (population 265,638), 30.5 miles away. The nearest place of 10,000 or more is Fremont, OH (population 15,814), 14.4 miles away.

Ottawa County FIPS code

The FIPS code of Ottawa County is 39123: state code 39 for Ohio plus county code 123. Use it as text, with the leading zero, when joining Census, BLS, or CDC county tables. SAIPE lists its 2023 median household income as $76,582.

Questions people ask

What is the population of Ottawa County, Ohio?

The Census Vintage 2024 estimate for July 1, 2024 is 39,692. That is down 606 people (1.5%) from the July 2020 estimate of 40,298.

What is the FIPS code of Ottawa County?

39123. The first two digits (39) are Ohio; the last three (123) identify the county.

What is the largest town in Ottawa County?

Port Clinton, with 5,915 residents inside Ottawa County in 2024.

Which counties border Ottawa County?

4 county-equivalents border it in the Census 2024 adjacency file: Lucas County, OH; Wood County, OH; Erie County, OH; Sandusky County, OH.

Sources and data as of

Data as of: Census Vintage 2024 population estimates, 2024 Gazetteer land area and internal points, SAIPE 2023 median household income.

  1. 01Census Vintage 2024 county population estimates
  2. 02Census 2024 Gazetteer, counties
  3. 03Census SAIPE 2023 state and county estimates
  4. 04Census Vintage 2024 subcounty population estimates
  5. 05Census 2024 county adjacency file
  6. 06Census 2024 cartographic boundary file, counties (1:5,000,000)

How every number is computed: methodology. Spotted a wrong figure? Report an error.