The demographic universe estimates for the 1998-1999 television season as defined and published by Nielsen Media Research.
| Demographic | Population | Share |
|---|---|---|
| Households | 99,400,000 | |
| Persons 2+ | 256,630,000 | |
| Persons 2-11 | 39,430,000 | 15.4% |
| Persons 6-11 | 23,890,000 | 9.31% |
| Persons 12-17 | 22,140,000 | 8.63% |
| Persons 18+ | 195,060,000 | 76.0% |
| Persons 18-34 | 61,350,000 | 23.9% |
| Persons 18-49 | 123,900,000 | 48.3% |
| Persons 25-54 | 116,820,000 | 45.5% |
| Persons 35+ | 133,710,000 | 52.1% |
| Persons 35-64 | 101,760,000 | 39.7% |
| Persons 50+ | 71,160,000 | 27.7% |
| Persons 50-54 | 16,350,000 | 6.37% |
| Persons 55+ | 54,810,000 | 21.4% |
| Males 2-11 | 20,160,000 | 7.86% |
| Males 12-17 | 11,270,000 | 4.39% |
| Males 18-34 | 30,630,000 | 11.9% |
| Males 18-49 | 61,240,000 | 23.9% |
| Males 25-54 | 57,490,000 | 22.4% |
| Males 35-64 | 49,450,000 | 19.3% |
| Males 55+ | 24,170,000 | 9.42% |
| Females 2-11 | 19,270,000 | 7.51% |
| Females 12-17 | 10,870,000 | 4.24% |
| Females 18-34 | 30,720,000 | 12.0% |
| Females 18-49 | 62,660,000 | 24.4% |
| Females 25-54 | 59,330,000 | 23.1% |
| Females 35-64 | 52,310,000 | 20.4% |
| Females 55+ | 30,640,000 | 11.9% |