Lyman County, SD Population

Overview

3,746

Total Population

35.0

Median age

46.82%

Female population %

113.6:100

Gender ratio (M:F)

0-4 years

Largest age group

68.6

Total dependency ratio

White

Largest racial group

41

Hispanic population

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

TABLE OF CONTENTS

Age

Lyman County's population is young compared to the rest of the country:

The median age in Lyman County is 35.0, compared to 38.8 nationwide, according to the American Community Survey 2017 - 2021 5 Year estimates.
Lyman County's population under 18 was 29.77%, compared to the 22.51% nationwide.
Lyman County's elderly or the senior population (over 65 age) was 15.80% as compared to 16.04% nationwide.
Of the total population in Lyman County, 24.88% were under the age of 15, 19.25% aged 15 to 29, 40.07% aged 30 to 64, 13.64% aged 65 to 84, and 2.16% were 85 years of age and older.

There are 238 less females than males in Lyman County:

The female percentage in the USA is 50.50% while the male percentage is 49.50%, compared to 46.82% females and 53.18% males in Lyman County, SD.
The Lyman County, SD gender ratio is 113.6:100 i.e. 113.6 men to 100 women (1.136).
For male population, the largest age group is 0-4 years with a population of 193.
For the female population, the largest age group is 5-9 years with a population of 151.

Lyman County's population has become increasingly diverse:

Racial distribution of Lyman County population: 54.56% are White, 43.59% are American Indian and Alaska Native, 0.29% are Asian, 0.13% are Native Hawaiian and other Pacific Islander, 0.27% are some other race and 1.15% are multiracial.
Lyman County's racial breakdown clearly shows that there is an absolute majority of White population in the county.
By ethnicity, 41 is Hispanic or Latino (of any race), and 3,705 (98.91% of the total population) is Non-Hispanic.
The largest racial group in Lyman County is White with a population of 2,044 (54.56% of the total population).

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

The peak population was 3,914 in the year 2003
From 2000 to 2010, Lyman County's population decreased by 138 (3.54%), as compared to the national growth of 9.63%.
From 2010 to 2020, Lyman County's population decreased by 52 (1.38%), 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, Lyman County's population was lowest in year 2022 at 3,692.