According the 2000 Census, the median age
 in Orange County is 33.3. In 1990 it was 31.2.

Age Group

2000 Census

1990 Census

All Ages

1,416,045

100.00%

2,846,289

100.00%

Under 5

110,404

7.80%

216,014

7.59%

5 to 9

119,084

8.41%

231,928

8.15%

10 to 14

104,570

7.38%

204,119

7.17%

15 to 19

101,227

7.15%

194,543

6.83%

20 to 24

98,152

6.93%

189,996

6.68%

25 to 34

239,215

16.89%

466,324

16.38%

35 to 44

242,282

17.11%

477,289

16.77%

45 to 54

176,624

12.47%

360,739

12.67%

55 to 59

62,232

4.39%

128,152

4.50%

60 to 64

46,369

3.27%

96,422

3.39%

65 to 74

67,365

4.76%

148,702

5.22%

75 to 84

38,628

2.73%

97,967

3.44%

85 plus

9,893

0.70%

34,094

1.20%