The 1990-1991 television season is the 45th network season in United States television history. It began on Monday, September 17, 1990 and ended on Sunday, April 28, 1991. The effective start date of the 1990-91 season for the purposes of audience measurement was Monday, September 17, 1990 through Sunday, September 15, 1991.
Universe estimates used to calculate a program or network's rating within that particular demographic for the 1990-91 TV season. See the extended 1990-1991 universe estimates.
| Demographic | Population | Share |
|---|---|---|
| Households | 93,100,000 | |
| Persons 2+ | 237,120,000 | |
| Persons 2-11 | 35,580,000 | 15.0% |
| Persons 2-5 | 14,320,000 | 6.04% |
| Persons 6-11 | 21,260,000 | 8.97% |
| Persons 6-8 | 10,840,000 | 4.57% |
| Persons 9-11 | 10,420,000 | 4.39% |
| Persons 12-14 | 10,010,000 | 4.22% |
| Persons 12-17 | 19,750,000 | 8.33% |
| Persons 15-17 | 9,740,000 | 4.11% |