Demographics of Ottawa County, Ohio

Ottawa County, Ohio had 39,481 people on July 1, 2025, by the Census Bureau’s estimate: −822 since July 2020. Age, income, poverty, housing and origin below come from the American Community Survey, averaged over 2020–2024, each with its margin of error.

Ottawa County, in four figures

39,481
Population: July 1, 2025, Vintage 2025 estimate.; −2.0%
Change since July 2020: −822 people.; 50.6 ±0.3
Median age: ACS 2020–⁠2024.; $76,101 ±$3,220
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. Each year's change is births less deaths, net moves from abroad and net moves from elsewhere in the country, with the Bureau's small residual. The 2020 row's components run 3 months, from the April census to July 1.

Ottawa County, Ohio's population shrank 2.0% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Ottawa County, Ohio's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

U.S. Census Bureau — Census Bureau population estimates — counties and Puerto Rico municipios, with components of change

About this chart

The figures

Ottawa County, Ohio's population shrank 2.0% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Ottawa County, Ohio's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	40,303	100.0	100.0
2021	40,143	99.6	100.2
2022	39,945	99.1	100.7
2023	39,810	98.8	101.6
2024	39,729	98.6	102.5
2025	39,481	98.0	103.1

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Population of Ottawa County, Ohio on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	40,303	−64	−63	0	−8
2021	40,143	−160	−322	+7	+136
2022	39,945	−198	−347	+15	+153
2023	39,810	−135	−271	+14	+128
2024	39,729	−81	−259	+30	+150
2025	39,481	−248	−251	+23	−21

Age, 2020–2024

The median age is 50.6 ±0.3: for men 50.2 ±0.4 and for women 51.1 ±0.5. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Ottawa County by age, ACS 2020–2024
Age	People	Share	Ohio	United States
Under 5	1,537 ±75	3.8% ±0.2	5.7% ±<0.1	5.6% ±<0.1
5 to 17	5,478 ±336	13.7% ±0.8	16.3% ±0.1	16.3% ±<0.1
18 to 24	2,513 ±224	6.3% ±0.6	8.9% ±0.1	9.1% ±<0.1
25 to 44	8,016 ±402	20.0% ±1.0	25.7% ±0.1	26.9% ±<0.1
45 to 64	11,380 ±497	28.5% ±1.2	25.1% ±0.1	24.8% ±<0.1
65 and over	11,070 ±543	27.7% ±1.4	18.3% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $76,101 ±$3,220, and income per person $49,306 ±$6,471, in 2024 dollars. The median is $71,389 ±$321 in Ohio and $80,734 ±$166 in the United States.

Households by income

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Households in Ottawa County by income, ACS 2020–2024
Household income	Households	Share	Ohio	United States
Under $25,000	2,370 ±344	12.8% ±1.8	16.3% ±0.2	14.6% ±<0.1
$25,000 to $49,999	3,506 ±436	18.9% ±2.3	19.1% ±0.2	16.7% ±<0.1
$50,000 to $74,999	3,250 ±389	17.6% ±2.1	16.9% ±0.1	15.5% ±<0.1
$75,000 to $99,999	2,476 ±293	13.4% ±1.6	13.1% ±0.1	12.6% ±<0.1
$100,000 to $149,999	3,505 ±363	18.9% ±1.9	17.1% ±0.1	17.5% ±<0.1
$150,000 to $199,999	1,903 ±293	10.3% ±1.6	8.3% ±0.1	9.6% ±<0.1
$200,000 or more	1,494 ±199	8.1% ±1.1	9.1% ±0.1	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Ottawa County by age, ACS 2020–2024
Age	Below poverty	Rate	Ohio	United States
All ages	3,319 ±532	8.4% ±1.4	13.3% ±0.2	12.5% ±0.1
Under 18	627 ±203	9.1% ±2.9	17.8% ±0.3	16.1% ±0.1
18 to 59	1,517 ±295	8.4% ±1.6	12.7% ±0.2	11.6% ±0.1
60 and over	1,175 ±217	8.1% ±1.5	10.6% ±0.2	11.0% ±<0.1

Housing, 2020–2024

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Housing in Ottawa County, ACS 2020–2024
Measure	Ottawa County	Ohio	United States
Housing units	28,911 ±42	5,292,391 ±464	143,775,355 ±10,234
Occupied	64.0% ±1.4	91.9% ±0.2	89.9% ±0.1
Vacant	36.0% ±1.4	8.1% ±0.2	10.1% ±0.1
Owner occupied	83.6% ±1.8	67.2% ±0.3	65.2% ±0.3
Renter occupied	16.4% ±2.0	32.8% ±0.2	34.8% ±0.1
Median home value	$219,900 ±$7,998	$214,800 ±$742	$332,700 ±$236
Median gross rent	$930 ±$34	$1,034 ±$5	$1,413 ±$2
Median year built	1976 ±2	1970 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Ottawa County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Ohio	United States
Hispanic or Latino	2,113 ±0	5.3% ±<0.1	4.8% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	36,131 ±224	90.3% ±0.6	75.8% ±<0.1	57.4% ±<0.1
Black alone, not Hispanic	383 ±135	1.0% ±0.3	12.0% ±<0.1	11.9% ±<0.1
Asian alone, not Hispanic	153 ±30	0.4% ±0.1	2.5% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	7 to 55	< 0.1% to 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 33	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	48 to 156	0.1% to 0.4%	0.4% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	1,071 ±281	2.7% ±0.7	4.3% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Ottawa County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Ohio	United States
Born in the state	33,787 ±517	84.5% ±1.3	74.6% ±0.1	57.3% ±<0.1
Born in another state	5,580 ±482	14.0% ±1.2	19.2% ±0.1	26.9% ±<0.1
Born a citizen outside the states	300 ±132	0.8% ±0.3	1.0% ±<0.1	1.7% ±<0.1
Born abroad	327 ±85	0.8% ±0.2	5.2% ±0.1	14.1% ±<0.1
Naturalized citizens	145 ±60	0.4% ±0.2	2.8% ±<0.1	7.4% ±<0.1
Not citizens	182 ±70	0.5% ±0.2	2.5% ±0.1	6.8% ±<0.1

Ottawa County among the counties of Ohio

62nd of 88 by population, July 2025. Every one is listed on the Ohio page.

Counties of Ohio near Ottawa County in population, July 2025
County	July 2025	Change since 2020
Mercer County	42,737	+0.5%
Clinton County	42,301	+0.6%
Crawford County	41,896	−0.3%
Fulton County	41,853	−1.9%
Preble County	40,664	−0.8%
Ottawa County	39,481	−2.0%
Champaign County	38,820	+0.2%
Guernsey County	38,379	−0.1%
Defiance County	38,292	+0.1%
Coshocton County	37,188	+1.6%
Williams County	36,549	−1.4%

Elsewhere on the site

Sources

Census Bureau population estimates — counties and Puerto Rico municipios, with components of change — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Data retrieved September 25, 2026