The Cosby Show Broadcast history and ratings Broadcast history and ratings

| Season | Season_premiere | Season_finale | TV_season | Ranking | Households_in_millions |
|---|---|---|---|---|---|
| 1 | September 20, 1984 | May 9, 1985 | 1984–1985 | #3 | 20.546 (24.2 rating) |
| 2 | September 26, 1985 | May 15, 1986 | 1985–1986 | #1 | 28.948 (33.7 rating) |
| 3 | September 25, 1986 | May 7, 1987 | 1986–1987 | #1 | 30.503 (34.9 rating) |
| 4 | September 24, 1987 | April 28, 1988 | 1987–1988 | #1 | 30.503 (34.4 rating) |
| 5 | October 6, 1988 | May 11, 1989 | 1988–1989 | #1 | 23.14 (25.6 rating) |
| 6 | September 24, 1989 | May 3, 1990 | 1989–1990 | #1 (tie with Roseanne) | 21.27 (23.1 rating) |
| 7 | September 20, 1990 | May 2, 1991 | 1990–1991 | #5 | 15.92 (17.1 rating) |
| 8 | September 19, 1991 | April 30, 1992 | 1991–1992 | #18 | 13.81 (16.13 rating) |