City

1990

2000

Under
18

18
thru
64

65 &
Over

Total

Under
18

18
thru
64

65 &
Over

Total

Monroe County Incorporated places

Columbia

36

158

94

288

51

96

51

198

Fults

4

5

2

11

0

0

0

0

Hecker

3

9

3

15

13

11

0

24

Maeystown

10

9

0

19

0

4

2

6

Valmeyer

49

30

19

98

0

11

9

20

Waterloo

38

112

60

210

54

127

90

271

Incorporated Total

140

323

178

641

118

249

152

519

Unincorporated

146

213

62

421

81

184

89

354

Monroe County Total

286

536

240

1,062

199

433

241

873

Split City Totals

Columbia

46

96

51

193

Hecker

13

11

0

24

Source: U.S. Census Bureau