Overview
38,329
Total Population
40.6
Median age
49.89%
Female population %
100.4:100
Gender ratio (M:F)
60-64 years
Largest age group
59.3
Total dependency ratio
White
Largest racial group
4,025
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Defiance County's population is old compared to the rest of the country:
- The median age in Defiance County is 40.6, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Defiance County's population under 18 was 23.05%, compared to the 22.51% nationwide.
- Defiance County's elderly or the senior population (over 65 age) was 18.48% as compared to 16.04% nationwide.
- Of the total population in Defiance County, 18.75% were under the age of 15, 19.09% aged 15 to 29, 43.69% aged 30 to 64, 16.83% aged 65 to 84, and 1.65% were 85 years of age and older.

Read more about Defiance County, OH population by age ➔
Gender
There are 85 less females than males in Defiance County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 49.89% females and 50.11% males in Defiance County, OH.
- The Defiance County, OH gender ratio is 100.4:100 i.e. 100.4 men to 100 women (1.004).
- For male population, the largest age group is 15-19 years with a population of 1,456.
- For the female population, the largest age group is 60-64 years with a population of 1,469.

Read more about Defiance County, OH population by gender ➔
Race / Ethnicity
Defiance County's population has become increasingly diverse:
- Racial distribution of Defiance County population: 89.40% are White, 1.75% are Black or African American, 0.24% are American Indian and Alaska Native, 0.35% are Asian, 0.02% are Native Hawaiian and other Pacific Islander, 3.13% are some other race and 5.11% are multiracial.
- Defiance County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
- By ethnicity, 4,025 is Hispanic or Latino (of any race), and 34,304 (89.50% of the total population) is Non-Hispanic.
- The largest racial group in Defiance County is White with a population of 34,266 (89.40% of the total population).

Read more about Defiance County, OH population by race ➔
Year by year
Defiance County's population has already reached its peak and is showing a trend of decline:
- The peak population was 39,424 in the year 2000
- From 2000 to 2010, Defiance County's population decreased by 341 (0.86%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Defiance County's population decreased by 829 (2.12%), according to Census Bureau's Population Estimates Program. For the same period, the rate of growth for the United States was 7.17%.
- Between the year 2000 and 2022, Defiance County's population was lowest in year 2019 at 37,978.

Read more about Defiance County, OH population by year ➔
References
- U.S. Census Bureau American Community Survey (ACS) 2017-2021 5-Year Estimates
- U.S. Census Bureau Population Estimates Population Estimates Program (PEP)