Buchanan County, IA Population

Overview

20,598

Total Population

39.2

Median age

50.33%

Female population %

98.7:100

Gender ratio (M:F)

10-14 years

Largest age group

64.8

Total dependency ratio

White

Largest racial group

365

Hispanic population

Sources: U.S. Census Bureau, American Community Survey (ACS) 2021

TABLE OF CONTENTS

Age

Buchanan County's population is old compared to the rest of the country:

The median age in Buchanan County is 39.2, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Buchanan County's population under 18 was 26.36%, compared to the 22.51% nationwide.
Buchanan County's elderly or the senior population (over 65 age) was 17.74% as compared to 16.04% nationwide.
Of the total population in Buchanan County, 21.58% were under the age of 15, 16.79% aged 15 to 29, 43.89% aged 30 to 64, 15.60% aged 65 to 84, and 2.14% were 85 years of age and older.

There are 138 more females than males in Buchanan County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 50.33% females and 49.67% males in Buchanan County, IA.
The Buchanan County, IA gender ratio is 98.7:100 i.e. 98.7 men to 100 women (0.987).
For male population, the largest age group is 10-14 years with a population of 963.
For the female population, the largest age group is 10-14 years with a population of 765.

Buchanan County's population has become increasingly diverse:

Racial distribution of Buchanan County population: 96.94% are White, 0.64% are Black or African American, 0.24% are American Indian and Alaska Native, 0.05% are Asian, 0.08% are Native Hawaiian and other Pacific Islander, 0.07% are some other race and 1.98% are multiracial.
Buchanan County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 365 is Hispanic or Latino (of any race), and 20,233 (98.23% of the total population) is Non-Hispanic.
The largest racial group in Buchanan County is White with a population of 19,967 (96.94% of the total population).

Buchanan County's population has already reached its peak and is showing a trend of decline:

The peak population was 21,226 in the year 2008
From 2000 to 2010, Buchanan County's population decreased by 96 (0.46%), as compared to the national growth of 9.63%.
From 2010 to 2020, Buchanan County's population decreased by 369 (1.76%), 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, Buchanan County's population was lowest in year 2020 at 20,606.