The 1999-2000 television season is the 54th network season in United States television history. It began on Sunday, September 19, 1999 and ended on Sunday, May 28, 2000. The effective start date of the 1999-2000 season for the purposes of audience measurement was Sunday, September 19, 1999 through Friday, September 15, 2000.
Universe estimates used to calculate a program or network's rating within that particular demographic for the 1999-2000 TV season.
| Demographic | Population | Share |
|---|---|---|
| Households | 100,800,000 | |
| Persons 2+ | 267,120,000 | |
| Persons 2-11 | 39,800,000 | 14.9% |
| Persons 18-49 | 124,500,000 | 46.6% |
| Persons 25-54 | 118,000,000 | 44.2% |
| Females 18-49 | 62,900,000 | 23.6% |