The 1977-1978 television season is the 32nd network season in United States television history. It began on Monday, September 19, 1977 and ended on Sunday, April 30, 1978. The effective start date of the 1977-78 season for the purposes of audience measurement was Monday, September 19, 1977 through Sunday, September 17, 1978.
Universe estimates used to calculate a program or network's rating within that particular demographic for the 1977-78 TV season. See the extended 1977-1978 universe estimates.
| Demographic | Population | Share |
|---|---|---|
| Households | 72,900,000 | |
| Persons 2+ | 203,990,000 | |
| Persons 2-11 | 33,330,000 | 16.3% |
| Persons 6-11 | 20,950,000 | 10.3% |
| Persons 12-17 | 24,380,000 | 12.0% |
| Persons 18+ | 146,280,000 | 71.7% |
| Persons 18-34 | 58,750,000 | 28.8% |
| Persons 18-49 | 93,150,000 | 45.7% |
| Persons 25-54 | 78,080,000 | 38.3% |
| Persons 35+ | 87,530,000 | 42.9% |