Demographics
Historical population| Census | Pop. | Note | %± |
|---|
| 1830 | 387 | | — |
|---|
| 1840 | 4,465 | | 1,053.7% |
|---|
| 1850 | 8,018 | | 79.6% |
|---|
| 1860 | 16,633 | | 107.4% |
|---|
| 1870 | 20,991 | | 26.2% |
|---|
| 1880 | 23,821 | | 13.5% |
|---|
| 1890 | 24,897 | | 4.5% |
|---|
| 1900 | 24,953 | | 0.2% |
|---|
| 1910 | 25,198 | | 1.0% |
|---|
| 1920 | 24,627 | | −2.3% |
|---|
| 1930 | 24,316 | | −1.3% |
|---|
| 1940 | 25,510 | | 4.9% |
|---|
| 1950 | 26,202 | | 2.7% |
|---|
| 1960 | 29,968 | | 14.4% |
|---|
| 1970 | 33,669 | | 12.3% |
|---|
| 1980 | 36,369 | | 8.0% |
|---|
| 1990 | 36,956 | | 1.6% |
|---|
| 2000 | 39,188 | | 6.0% |
|---|
| 2010 | 37,642 | | −3.9% |
|---|
| 2020 | 37,102 | | −1.4% |
|---|
| 2024 (est.) | 36,554 | [8] | −1.5% |
|---|
|
As of the fourth quarter of 2024, the median home value in Williams County was $150,917. [13]
As of the 2023 American Community Survey, there are 15,455 estimated households in Williams County with an average of 2.32 persons per household. The county has a median household income of $61,834. Approximately 11.1% of the county's population lives at or below the poverty line. Williams County has an estimated 61.6% employment rate, with 14.2% of the population holding a bachelor's degree or higher and 91.4% holding a high school diploma. [2]
The top five reported ancestries (people were allowed to report up to two ancestries, thus the figures will generally add to more than 100%) were English (96.3%), Spanish (2.4%), Indo-European (0.7%), Asian and Pacific Islander (0.6%), and Other (0.1%).
The median age in the county was 41.8 years.
2024 estimate
As of the 2024 estimate, there were 36,554 people and 15,455 households residing in the county. There were 16,624 housing units at an average density of 39.52 per square mile (15.3/km2). The racial makeup of the county was 96.1% White (91.1% NH White), 1.4% African American, 0.4% Native American, 0.6% Asian, 0.0% Pacific Islander, _% from some other races and 1.4% from two or more races. Hispanic or Latino people of any race were 5.6% of the population. [14]
2020 census
Williams County, Ohio – Racial and ethnic composition
Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category. Hispanics/Latinos may be of any race.| Race / Ethnicity (NH = Non-Hispanic) | Pop 1980 [15] | Pop 1990 [16] | Pop 2000 [17] | Pop 2010 [18] | Pop 2020 [19] | % 1980 | % 1990 | % 2000 | % 2010 | % 2020 |
|---|
| White alone (NH) | 35,544 | 35,934 | 37,338 | 35,283 | 33,483 | 97.73% | 97.23% | 95.28% | 93.73% | 90.25% |
| Black or African American alone (NH) | 9 | 20 | 278 | 358 | 323 | 0.02% | 0.05% | 0.71% | 0.95% | 0.87% |
| Native American or Alaska Native alone (NH) | 49 | 44 | 77 | 65 | 55 | 0.13% | 0.12% | 0.20% | 0.17% | 0.15% |
| Asian alone (NH) | 63 | 125 | 199 | 212 | 198 | 0.17% | 0.34% | 0.51% | 0.56% | 0.53% |
| Native Hawaiian or Pacific Islander alone (NH) | x [20] | x [21] | 3 | 7 | 0 | x | x | 0.01% | 0.02% | 0.00% |
| Other race alone (NH) | 30 | 7 | 12 | 14 | 92 | 0.08% | 0.02% | 0.03% | 0.04% | 0.25% |
| Mixed race or Multiracial (NH) | x [22] | x [23] | 232 | 313 | 1,089 | x | x | 0.59% | 0.83% | 2.94% |
| Hispanic or Latino (any race) | 674 | 826 | 1,049 | 1,390 | 1,862 | 1.85% | 2.24% | 2.68% | 3.69% | 5.02% |
| Total | 36,369 | 36,956 | 39,188 | 37,642 | 37,102 | 100.00% | 100.00% | 100.00% | 100.00% | 100.00% |
As of the 2020 census, there were 37,102 people, 15,262 households, and 9,858 families residing in the county. [24] The population density was 88.2 inhabitants per square mile (34.1/km2). There were 16,561 housing units at an average density of 39.37 per square mile (15.2/km2). The racial makeup of the county was 92.08% White, 0.90% African American, 0.23% Native American, 0.54% Asian, 0.02% Pacific Islander, 1.77% from some other races and 4.46% from two or more races. Hispanic or Latino people of any race were 5.02% of the population. [25]
2010 census
As of the 2010 census, there were 37,642 people, 15,075 households, and 10,260 families residing in the county. The population density was 89.4 inhabitants per square mile (34.5/km2). There were 16,668 housing units at an average density of 39.59 per square mile (15.3/km2). The racial makeup of the county was 95.95% White, 0.96% African American, 0.23% Native American, 0.57% Asian, 0.02% Pacific Islander, 1.08% from some other races and 1.19% from two or more races. Hispanic or Latino people of any race were 3.69% of the population.
In terms of ancestry, 46.1% were German, 12.0% were Irish, 10.7% were English, and 7.8% were American.
There were 15,075 households, 31.0% had children under the age of 18 living with them, 53.0% were married couples living together, 9.9% had a female householder with no husband present, 31.9% were non-families, and 27.0% of all households were made up of individuals. The average household size was 2.43 and the average family size was 2.93. The median age was 40.7 years.
The median income for a household in the county was $44,538 and the median income for a family was $52,975. Males had a median income of $40,658 versus $29,064 for females. The per capita income for the county was $21,381. About 9.1% of families and 11.8% of the population were below the poverty line, including 17.6% of those under age 18 and 8.6% of those age 65 or over.
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