40 is median age of St. Louis County residents by 2021

USCB Deputy Director and Chief Operating Officer | United States Census Bureau

By West STL News

Jan 26, 2024

St. Louis County residents have a median age of 40-years-old as of 2021, according to US Census Data.

Median ages divide a population into two equally sized groups, rather than the average which takes all the ages of St. Louis County residents and divides it by the number of residents.

OurWorldinData.org, an online project tracking global data and trends, says cities, states, countries and continents with higher median ages typically do better economically and residents earn higher wages than developing countries.

The median age of a United States resident has risen from 29.5-years-old in 1960 to 38.4-years-old in 2019. It has risen fairly consistently by two years every decade since the 1970's.

Median ages of men and women by Ethnicity in St. Louis County

Ethnicity	Median Age - Male	Median Age - Female
American Indian and Alaska Native	42	34
Asian	36	36
Black or African American	30	36
Hispanic or Latino	29	27
White	43	47
Native Hawaiian and Other Pacific Islander	22	23
Some other race	30	29
Multiracial	20	23

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