The 1979-1980 television season is the 34th network season in United States television history. It began on Monday, September 17, 1979 and ended on Sunday, April 27, 1980. The effective start date of the 1979-80 season for the purposes of audience measurement was Monday, September 17, 1979 through Sunday, October 26, 1980.
Universe estimates used to calculate a program or network's rating within that particular demographic for the 1979-80 TV season. See the extended 1979-1980 universe estimates.
| Demographic | Population | Share |
|---|---|---|
| Households | 76,300,000 | |
| Persons 2+ | 206,330,000 | |
| Persons 2-11 | 31,330,000 | 15.2% |
| Persons 6-11 | 19,880,000 | 9.64% |
| Persons 12-17 | 22,760,000 | 11.0% |
| Persons 18+ | 152,240,000 | 73.8% |
| Persons 18-34 | 61,760,000 | 29.9% |
| Persons 18-49 | 97,370,000 | 47.2% |
| Persons 25-54 | 81,450,000 | 39.5% |
| Persons 35+ | 90,480,000 | 43.9% |