Summary: Summary of age-related census data for 1990 and 2000
| | Amount |
| | 2000 | | 1990 | |
| | Oklahoma | National | % National | Oklahoma | National | % National |
| Households | | | | | | |
| All | 1,342,293 | 105,480,101 | 1.3% | 1,206,135 | 91,947,410 | 1.3% |
| Age 65+ | 319,395 | 24,672,708 | 1.3% | 299,390 | 22,154,422 | 1.4% |
| Alone | 135,273 | 9,722,857 | 1.4% | 131,237 | 8,824,845 | 1.5% |
| Not Alone | 184,122 | 14,949,851 | 1.2% | 168,153 | 13,329,577 | 1.3% |
| | | | | | | |
| Population | | | | | | |
| All Ages | 3,450,654 | 281,421,906 | 1.2% | 3,145,585 | 248,709,873 | 1.3% |
| Under 5 years | 236,353 | 19,175,798 | 1.2% | 226,523 | 18,354,443 | 1.2% |
| 5 to 9 years | 244,525 | 20,549,505 | 1.2% | 244,122 | 18,099,179 | 1.3% |
| 10 to 14 years | 252,029 | 20,528,072 | 1.2% | 231,892 | 17,114,249 | 1.4% |
| 15 to 19 years | 269,373 | 20,219,890 | 1.3% | 233,093 | 17,754,015 | 1.3% |
| 20 to 24 years | 247,165 | 18,964,001 | 1.3% | 222,766 | 19,020,312 | 1.2% |
| 25 to 34 years | 451,647 | 39,891,724 | 1.1% | 509,319 | 43,175,932 | 1.2% |
| 35 to 44 years | 523,522 | 45,148,527 | 1.2% | 452,241 | 37,578,903 | 1.2% |
| 45 to 54 years | 453,761 | 37,677,952 | 1.2% | 322,975 | 25,223,086 | 1.3% |
| 55 to 59 years | 173,199 | 13,469,237 | 1.3% | 141,214 | 10,531,756 | 1.3% |
| 60 to 64 years | 143,130 | 10,805,447 | 1.3% | 137,227 | 10,616,167 | 1.3% |
| 65 to 74 years | 242,499 | 18,390,986 | 1.3% | 235,135 | 18,106,558 | 1.3% |
| 75 to 84 years | 156,276 | 12,361,180 | 1.3% | 143,230 | 10,055,108 | 1.4% |
| 85 years and over | 57,175 | 4,239,587 | 1.3% | 45,848 | 3,080,165 | 1.5% |
| | | | | | | |
| Under Age 15 | 732,907 | 60,253,375 | 1.2% | 702,537 | 53,567,871 | 1.3% |
| Age 15-24 | 516,538 | 39,183,891 | 1.3% | 455,859 | 36,774,327 | 1.2% |
| Age 25-34 | 451,647 | 39,891,724 | 1.1% | 509,319 | 43,175,932 | 1.2% |
| Age 35-44 | 523,522 | 45,148,527 | 1.2% | 452,241 | 37,578,903 | 1.2% |
| Age 45-54 | 453,761 | 37,677,952 | 1.2% | 322,975 | 25,223,086 | 1.3% |
| Age 55-64 | 316,329 | 24,274,684 | 1.3% | 278,441 | 21,147,923 | 1.3% |
| Age 65-74 | 242,499 | 18,390,986 | 1.3% | 235,135 | 18,106,558 | 1.3% |
| Age 75-84 | 156,276 | 12,361,180 | 1.3% | 143,230 | 10,055,108 | 1.4% |
| Age 85+ | 57,175 | 4,239,587 | 1.3% | 45,848 | 3,080,165 | 1.5% |
| | | | | | | |
| Under Age 55 | 2,678,375 | 222,155,469 | 1.2% | 2,442,931 | 196,320,119 | 1.2% |
| Age 55+ | 772,279 | 59,266,437 | 1.3% | 702,654 | 52,389,754 | 1.3% |
| Age 65+ | 455,950 | 34,991,753 | 1.3% | 424,213 | 31,241,831 | 1.4% |
| Age 75+ | 213,451 | 16,600,767 | 1.3% | 189,078 | 13,135,273 | 1.4% |
| Age 85+ | 57,175 | 4,239,587 | 1.3% | 45,848 | 3,080,165 | 1.5% |
| | | | | | | |
| Age 65+ population living alone | 30% | 28% | | 31% | 28% | |
| | | | | | | |
| | 1990-2000 Change |
| | Amount of Change | Percentage Change |
| | Oklahoma | National | % National | Oklahoma | National | Difference |
| Households | | | | | | |
| All | 136,158 | 13,532,691 | 1.0% | 11% | 15% | (4%) |
| Age 65+ | 20,005 | 2,518,286 | 0.8% | 7% | 11% | (4%) |
| Alone | 4,036 | 898,012 | 0.4% | 3% | 10% | (7%) |
| Not Alone | 15,969 | 1,620,274 | 1.0% | 9% | 12% | (3%) |
| | | | | | | |
| Population | | | | | | |
| All Ages | 305,069 | 32,712,033 | 0.9% | 10% | 13% | (3%) |
| Under 5 years | 9,830 | 821,355 | 1.2% | 4% | 4% | - |
| 5 to 9 years | 403 | 2,450,326 | - | - | 14% | (14%) |
| 10 to 14 years | 20,137 | 3,413,823 | 0.6% | 9% | 20% | (11%) |
| 15 to 19 years | 36,280 | 2,465,875 | 1.5% | 16% | 14% | 2% |
| 20 to 24 years | 24,399 | (56,311) | 43.3% | 11% | - | 11% |
| 25 to 34 years | (57,672) | (3,284,208) | (1.8%) | (11%) | (8%) | (3%) |
| 35 to 44 years | 71,281 | 7,569,624 | 0.9% | 16% | 20% | (4%) |
| 45 to 54 years | 130,786 | 12,454,866 | 1.1% | 40% | 49% | (9%) |
| 55 to 59 years | 31,985 | 2,937,481 | 1.1% | 23% | 28% | (5%) |
| 60 to 64 years | 5,903 | 189,280 | 3.1% | 4% | 2% | 2% |
| 65 to 74 years | 7,364 | 284,428 | 2.6% | 3% | 2% | 1% |
| 75 to 84 years | 13,046 | 2,306,072 | 0.6% | 9% | 23% | (14%) |
| 85 years and over | 11,327 | 1,159,422 | 1.0% | 25% | 38% | (13%) |
| | | | | | | |
| Under Age 15 | 30,370 | 6,685,504 | 0.5% | 4% | 12% | (8%) |
| Age 15-24 | 60,679 | 2,409,564 | 2.5% | 13% | 7% | 6% |
| Age 25-34 | (57,672) | (3,284,208) | (1.8%) | (11%) | (8%) | (3%) |
| Age 35-44 | 71,281 | 7,569,624 | 0.9% | 16% | 20% | (4%) |
| Age 45-54 | 130,786 | 12,454,866 | 1.1% | 40% | 49% | (9%) |
| Age 55-64 | 37,888 | 3,126,761 | 1.2% | 14% | 15% | (1%) |
| Age 65-74 | 7,364 | 284,428 | 2.6% | 3% | 2% | 1% |
| Age 75-84 | 13,046 | 2,306,072 | 0.6% | 9% | 23% | (14%) |
| Age 85+ | 11,327 | 1,159,422 | 1.0% | 25% | 38% | (13%) |
| | | | | | | |
| Under Age 55 | 235,444 | 25,835,350 | 0.9% | 10% | 13% | (3%) |
| Age 55+ | 69,625 | 6,876,683 | 1.0% | 10% | 13% | (3%) |
| Age 65+ | 31,737 | 3,749,922 | 0.8% | 7% | 12% | (5%) |
| Age 75+ | 24,373 | 3,465,494 | 0.7% | 13% | 26% | (13%) |
| Age 85+ | 11,327 | 1,159,422 | 1.0% | 25% | 38% | (13%) |
| | | | | | | |
| | Percent of Total |
| | 2000 | 1990 |
| | Oklahoma | National | Difference | Oklahoma | National | Difference |
| Households | | | | | | |
| Age 65+ | 24% | 23% | 1% | 25% | 24% | 1% |
| Alone | 10% | 9% | 1% | 11% | 10% | 1% |
| Not Alone | 14% | 14% | - | 14% | 14% | - |
| | | | | | | |
| Population | | | | | | |
| Under 5 years | 7% | 7% | - | 7% | 7% | - |
| 5 to 9 years | 7% | 7% | - | 8% | 7% | 1% |
| 10 to 14 years | 7% | 7% | - | 7% | 7% | - |
| 15 to 19 years | 8% | 7% | 1% | 7% | 7% | - |
| 20 to 24 years | 7% | 7% | - | 7% | 8% | (1%) |
| 25 to 34 years | 13% | 14% | (1%) | 16% | 17% | (1%) |
| 35 to 44 years | 15% | 16% | (1%) | 14% | 15% | (1%) |
| 45 to 54 years | 13% | 13% | - | 10% | 10% | - |
| 55 to 59 years | 5% | 5% | - | 4% | 4% | - |
| 60 to 64 years | 4% | 4% | - | 4% | 4% | - |
| 65 to 74 years | 7% | 7% | - | 7% | 7% | - |
| 75 to 84 years | 5% | 4% | 1% | 5% | 4% | 1% |
| 85 years and over | 2% | 2% | - | 1% | 1% | - |
| | | | | | | |
| Under Age 15 | 21% | 21% | - | 22% | 22% | - |
| Age 15-24 | 15% | 14% | 1% | 14% | 15% | (1%) |
| Age 25-34 | 13% | 14% | (1%) | 16% | 17% | (1%) |
| Age 35-44 | 15% | 16% | (1%) | 14% | 15% | (1%) |
| Age 45-54 | 13% | 13% | - | 10% | 10% | - |
| Age 55-64 | 9% | 9% | - | 9% | 9% | - |
| Age 65-74 | 7% | 7% | - | 7% | 7% | - |
| Age 75-84 | 5% | 4% | 1% | 5% | 4% | 1% |
| Age 85+ | 2% | 2% | - | 1% | 1% | - |
| | | | | | | |
| Under Age 55 | 78% | 79% | (1%) | 78% | 79% | (1%) |
| Age 55+ | 22% | 21% | 1% | 22% | 21% | 1% |
| Age 65+ | 13% | 12% | 1% | 13% | 13% | - |
| Age 75+ | 6% | 6% | - | 6% | 5% | 1% |
| Age 85+ | 2% | 2% | - | 1% | 1% | - |