The fourth season of Designing Women premiered on CBS on September 18, 1989, and concluded on May 21, 1990.

Created by Linda Bloodworth-Thomason, the series was produced by Bloodworth/Thomason Mozark Productions in association with Columbia Pictures Television.

The season originally aired Mondays at 9:30-10:00 pm (EST) on CBS.

From 1989 through 1992, Designing Women and Murphy Brown aired back-to-back, creating a very successful hour-long block for CBS, as both shows were thought to appeal to similar demographics.

The show was a top 30 hit for three consecutive seasons (1989–92), making it the most successful at the time.