| Oregon |  |
AGE DISTRIBUTION
Drawn as a "population pyramid," an area's age-sex structure hints at its patterns of growth. A top heavy pyramid, like the one for Grant County, North Dakota , suggests negative population growth that might be due to any number of factors, including high death rates, low birth rates, and increased emigration from the area. A bottom heavy pyramid, like the one drawn for Orange County, Florida , suggests high birthrates, falling or stable death rates, and the potential for rapid population growth. Most areas, however, fall somewhere between these two extremes and have a population pyramid that resembles a square, indicating slow and sustained growth with the birth rate exceeding the death rate, though not by a great margin.
| Age Distribution by Sex, 2000 | ||||
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Male
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Female
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| Number | Percent | Number | Percent | |
| Total Population | 1,696,550 | 49.6% | 1,724,849 | 50.4% |
| 0-4 | 114,006 | 3.3% | 108,999 | 3.2% |
| 5-9 | 120,115 | 3.5% | 114,359 | 3.3% |
| 10-14 | 124,235 | 3.6% | 117,863 | 3.4% |
| 15-19 | 125,429 | 3.7% | 118,998 | 3.5% |
| 20-24 | 118,100 | 3.5% | 112,306 | 3.3% |
| 25-29 | 121,031 | 3.5% | 112,819 | 3.3% |
| 30-34 | 122,237 | 3.6% | 114,608 | 3.3% |
| 35-39 | 129,083 | 3.8% | 126,668 | 3.7% |
| 40-44 | 134,072 | 3.9% | 136,751 | 4.0% |
| 45-49 | 134,761 | 3.9% | 136,554 | 4.0% |
| 50-54 | 117,417 | 3.4% | 118,423 | 3.5% |
| 55-59 | 85,369 | 2.5% | 87,639 | 2.6% |
| 60-64 | 64,218 | 1.9% | 67,162 | 2.0% |
| 65-69 | 53,193 | 1.6% | 59,421 | 1.7% |
| 70-74 | 48,510 | 1.4% | 58,218 | 1.7% |
| 75-79 | 40,347 | 1.2% | 54,712 | 1.6% |
| 80-84 | 26,184 | 0.8% | 40,161 | 1.2% |
| 85 | 18,243 | 0.5% | 39,188 | 1.1% |
| Age Distribution by Sex, 1990 | ||||
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Male
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Female
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| Number | Percent | Number | Percent | |
| Total Population | 1,397,073 | 49.2% | 1,445,248 | 50.8% |
| 0-4 | 103,026 | 3.6% | 98,395 | 3.5% |
| 5-9 | 107,486 | 3.8% | 102,289 | 3.6% |
| 10-14 | 103,460 | 3.6% | 97,905 | 3.4% |
| 15-19 | 97,288 | 3.4% | 92,667 | 3.3% |
| 20-24 | 96,097 | 3.4% | 93,045 | 3.3% |
| 25-29 | 106,931 | 3.8% | 105,050 | 3.7% |
| 30-34 | 119,014 | 4.2% | 120,549 | 4.2% |
| 35-39 | 125,067 | 4.4% | 126,128 | 4.4% |
| 40-44 | 112,168 | 3.9% | 111,488 | 3.9% |
| 45-49 | 84,182 | 3.0% | 83,196 | 2.9% |
| 50-54 | 64,343 | 2.3% | 64,874 | 2.3% |
| 55-59 | 56,179 | 2.0% | 59,832 | 2.1% |
| 60-64 | 56,845 | 2.0% | 63,493 | 2.2% |
| 65-69 | 56,463 | 2.0% | 66,449 | 2.3% |
| 70-74 | 45,484 | 1.6% | 56,042 | 2.0% |
| 75-79 | 32,987 | 1.2% | 45,559 | 1.6% |
| 80-84 | 18,642 | 0.7% | 30,883 | 1.1% |
| 85 | 11,411 | 0.4% | 27,404 | 1.0% |
Source: Census 2000 analyzed by the Social Science Data Analysis Network (SSDAN).