MEDIAN AGE IN YEARS

County

1970

1980

1990

2000

St. Louis City

31.4

31.5

32.8

33.7

St. Louis

27.9

31.2

34.6

37.5

St. Charles

24.2

27.7

30.7

34.3

Jefferson

25.0

27.6

30.7

34.9

Franklin

28.1

29.1

32.2

35.8

Missouri Subtotal

28.4

30.5

33.3

36.0

Madison

28.4

30.9

33.9

36.9

St. Clair

26.8

28.5

32.0

35.3

Monroe

29.8

31.6

33.9

37.5

Illinois Subtotal

27.6

29.6

33.1

36.2

REGIONAL TOTAL

28.2

30.3

33.3

36.0

Source: U.S. Bureau of the Census

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