The World Group play-offs for the 1991 Federation Cup was held from 24 to 26 July at the Nottingham Tennis Centre in Nottingham, United Kingdom, on hard courts.
The sixteen teams that were defeated in the first round of the World Group played off in the first round. Those that lost again would then play off again in the Repechage Round; with the four teams that lost again being relegated to Zonal Competition in 1992.