Overview
10,446
Total Population
41.1
Median age
50.12%
Female population %
99.5:100
Gender ratio (M:F)
10-14 years
Largest age group
64.3
Total dependency ratio
White
Largest racial group
605
Hispanic population
Sources: U.S. Census Bureau, American Community Survey (ACS) 2021
TABLE OF CONTENTS
Age
Johnston County's population is old compared to the rest of the country:
- The median age in Johnston County is 41.1, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
- Johnston County's population under 18 was 23.90%, compared to the 22.51% nationwide.
- Johnston County's elderly or the senior population (over 65 age) was 19.18% as compared to 16.04% nationwide.
- Of the total population in Johnston County, 19.95% were under the age of 15, 18.05% aged 15 to 29, 42.81% aged 30 to 64, 17.01% aged 65 to 84, and 2.17% were 85 years of age and older.

Read more about Johnston County, OK population by age ➔
Gender
There are 26 more females than males in Johnston County:
- The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.12% females and 49.88% males in Johnston County, OK.
- The Johnston County, OK gender ratio is 99.5:100 i.e. 99.5 men to 100 women (0.995).
- For male population, the largest age group is 10-14 years with a population of 428.
- For the female population, the largest age group is 5-9 years with a population of 374.

Read more about Johnston County, OK population by gender ➔
Race / Ethnicity
Johnston County's population has become increasingly diverse:
- Racial distribution of Johnston County population: 69.16% are White, 1.60% are Black or African American, 8.33% are American Indian and Alaska Native, 0.07% are Asian, 0.20% are Native Hawaiian and other Pacific Islander, 1.97% are some other race and 18.68% are multiracial.
- Johnston County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
- By ethnicity, 605 is Hispanic or Latino (of any race), and 9,841 (94.21% of the total population) is Non-Hispanic.
- The largest racial group in Johnston County is White with a population of 7,224 (69.16% of the total population).

Read more about Johnston County, OK population by race ➔
Year by year
Johnston County's population has already reached its peak and is showing a trend of decline:
- The peak population was 11,133 in the year 2017
- From 2000 to 2010, Johnston County's population increased by 502 (4.78%), as compared to the national growth of 9.63%.
- From 2010 to 2020, Johnston County's population decreased by 762 (6.93%), 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, Johnston County's population was lowest in year 2005 at 10,228.

Read more about Johnston County, OK 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)