Walter Kresby (Matthew Broderick) makes reference to "The Wind Beneath My Wings", a popular song made famous by Bette Midler, who appears in the movie.
When Walter enters the lab where Stepford Wives are transformed. He's referred to as "Member 1956". This is the same number he punches in the front-door code to allow Joanna to leave.
Heavily re-edited and re-written following test screenings, with new scenes shot and others deleted. The attempts to cater to audience tastes backfired as the new edits and scenes created continuity errors and major story problems.
When the family is driving to Stepford, Pete says "But why are we moving?". Kimberly can be clearly seen mouthing his line before saying "to Conneticut?"