Demographics of Harper County, Oklahoma

Harper County, Oklahoma had 3,172 people on July 1, 2025, by the Census Bureau’s estimate: −74 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.

Harper County, in four figures

3,172
Population: July 1, 2025, Vintage 2025 estimate.; −2.3%
Change since July 2020: −74 people.; 40.9 ±2.2
Median age: ACS 2020–⁠2024.; $64,053 ±$10,380
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.

Harper County, Oklahoma's population shrank 2.3% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Harper County, Oklahoma'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

Harper County, Oklahoma's population shrank 2.3% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Harper County, Oklahoma'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	3,246	100.0	100.0
2021	3,173	97.8	100.2
2022	3,166	97.5	100.7
2023	3,201	98.6	101.6
2024	3,196	98.5	102.5
2025	3,172	97.7	103.1

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Population of Harper County, Oklahoma on July 1 of each year, Vintage 2025
July 1	Population	Change	Births less deaths	From abroad	From elsewhere in the country
2020	3,246	−19	−4	0	−13
2021	3,173	−73	−30	+3	−47
2022	3,166	−7	−16	+24	−14
2023	3,201	+35	+12	+12	+11
2024	3,196	−5	−2	+22	−25
2025	3,172	−24	−4	+19	−39

Age, 2020–2024

The median age is 40.9 ±2.2: for men 42.1 ±1.5 and for women 38.8 ±1.8. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Harper County by age, ACS 2020–2024
Age	People	Share	Oklahoma	United States
Under 5	196 ±59	6.1% ±1.9	6.1% ±<0.1	5.6% ±<0.1
5 to 17	567 ±94	17.7% ±2.9	17.8% ±0.1	16.3% ±<0.1
18 to 24	160 ±66	5.0% ±2.1	9.8% ±0.1	9.1% ±<0.1
25 to 44	845 ±128	26.4% ±4.0	26.6% ±0.1	26.9% ±<0.1
45 to 64	794 ±122	24.8% ±3.8	23.3% ±0.1	24.8% ±<0.1
65 and over	641 ±124	20.0% ±3.9	16.3% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $64,053 ±$10,380, and income per person $30,811 ±$3,752, in 2024 dollars. The median is $65,039 ±$439 in Oklahoma and $80,734 ±$166 in the United States.

Households by income

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Households in Harper County by income, ACS 2020–2024
Household income	Households	Share	Oklahoma	United States
Under $25,000	253 ±86	19.0% ±6.4	17.5% ±0.2	14.6% ±<0.1
$25,000 to $49,999	214 ±79	16.1% ±5.9	20.9% ±0.3	16.7% ±<0.1
$50,000 to $74,999	354 ±90	26.6% ±6.6	18.0% ±0.2	15.5% ±<0.1
$75,000 to $99,999	168 ±63	12.6% ±4.7	13.1% ±0.2	12.6% ±<0.1
$100,000 to $149,999	186 ±64	14.0% ±4.8	16.1% ±0.2	17.5% ±<0.1
$150,000 to $199,999	96 ±46	7.2% ±3.4	7.2% ±0.2	9.6% ±<0.1
$200,000 or more	20 to 104	1.5% to 7.8%	7.2% ±0.2	13.4% ±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%.

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 Harper County by age, ACS 2020–2024
Age	Below poverty	Rate	Oklahoma	United States
All ages	413 ±162	13.1% ±5.1	15.3% ±0.2	12.5% ±0.1
Under 18	55 to 185	7.5% to 24.0%	20.1% ±0.3	16.1% ±0.1
18 to 59	63 to 197	4.2% to 13.0%	14.8% ±0.2	11.6% ±0.1
60 and over	79 to 247	9.4% to 27.8%	11.5% ±0.2	11.0% ±<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%.

Housing, 2020–2024

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Housing in Harper County, ACS 2020–2024
Measure	Harper County	Oklahoma	United States
Housing units	1,714 ±20	1,775,127 ±745	143,775,355 ±10,234
Occupied	77.8% ±4.2	88.0% ±0.2	89.9% ±0.1
Vacant	22.2% ±4.1	12.0% ±0.1	10.1% ±0.1
Owner occupied	83.6% ±5.4	65.8% ±0.2	65.2% ±0.3
Renter occupied	16.4% ±5.6	34.2% ±0.2	34.8% ±0.1
Median home value	$99,200 ±$8,043	$199,800 ±$1,121	$332,700 ±$236
Median gross rent	$828 ±$82	$1,014 ±$6	$1,413 ±$2
Median year built	1965 ±2	1980 ±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 Harper County by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Oklahoma	United States
Hispanic or Latino	784 ±0	24.5% ±<0.1	12.7% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	2,269 ±5	70.8% ±0.2	62.1% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	0 to 6	0% to 0.2%	6.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	0 to 6	0% to 0.2%	2.4% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	13 to 77	0.4% to 2.4%	6.6% ±0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 10	0% to 0.3%	0.2% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 10	0% to 0.3%	0.3% ±<0.1	0.6% ±<0.1
Two or more races, not Hispanic	101 ±33	3.2% ±1.0	8.9% ±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 Harper County by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Oklahoma	United States
Born in the state	1,791 ±146	55.9% ±4.6	59.6% ±0.2	57.3% ±<0.1
Born in another state	980 ±144	30.6% ±4.5	32.9% ±0.2	26.9% ±<0.1
Born a citizen outside the states	0 to 39	0% to 1.2%	1.2% ±<0.1	1.7% ±<0.1
Born abroad	417 ±76	13.0% ±2.4	6.4% ±0.1	14.1% ±<0.1
Naturalized citizens	12 to 94	0.4% to 2.9%	2.6% ±0.1	7.4% ±<0.1
Not citizens	364 ±88	11.4% ±2.7	3.8% ±0.1	6.8% ±<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%.

Harper County among the counties of Oklahoma

75th of 77 by population, July 2025. Every one is listed on the Oklahoma page.

Counties of Oklahoma near Harper County in population, July 2025
County	July 2025	Change since 2020
Beaver County	4,882	−2.9%
Dewey County	4,207	−6.0%
Grant County	4,067	−2.8%
Ellis County	3,613	−3.4%
Roger Mills County	3,259	−5.0%
Harper County	3,172	−2.3%
Harmon County	2,327	−6.0%
Cimarron County	2,059	−10.0%

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