1991 Campionati Internazionali di Sicilia
Date	23–29 September
Edition	13th
Category	World Series
Draw	32S / 16D
Prize money	$270,000
Surface	Clay / outdoor
Location	Palermo, Italy
Champions
Singles
Frédéric Fontang[1]
Doubles
Jacco Eltingh / Tom Kempers[2]
← 1990 · Campionati Internazionali di Sicilia · 1992 →

The 1991 Campionati Internazionali di Sicilia was a men's tennis tournament played on outdoor clay courts in Palermo, Italy that was part of the World Series of the 1991 ATP Tour. It was the 13th edition of the tournament and took place from 23 September until 29 September 1991. Unseeded Frédéric Fontang won the singles title.^[3]

Frédéric Fontang defeated Emilio Sánchez 1–6, 6–3, 6–3

• It was Fontang's only singles title of his career.

Jacco Eltingh / Tom Kempers defeated Emilio Sánchez / Javier Sánchez 3–6, 6–3, 6–3

• ITF – tournament edition details