1998 Monte Carlo Open
Date	20–26 April
Edition	92nd
Category	ATP Masters Series
Draw	56S / 28D
Prize money	$2,450,000
Surface	Clay / outdoor
Location	Roquebrune-Cap-Martin, France
Venue	Monte Carlo Country Club
Champions
Singles
Carlos Moyá[1]
Doubles
Jacco Eltingh / Paul Haarhuis[2]
← 1997 · Monte Carlo Open · 1999 →

The 1998 Monte Carlo Open was a men's tennis tournament played on outdoor clay courts. It was the 92nd edition of the Monte Carlo Open, and was part of the ATP Masters Series of the 1998 ATP Tour. It took place at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France, near Monte Carlo, Monaco, from 20 April through 26 April 1998.

Fourteenth-seeded Carlos Moyá won the singles title.

Finals

Singles

Carlos Moyá defeated Cédric Pioline, 6–3, 6–0, 7–5

• It was Carlos Moyá's 1st title of the year, and his 4th overall. It was his 1st Masters title of the year, and overall.

Doubles

Jacco Eltingh / Paul Haarhuis defeated Todd Woodbridge / Mark Woodforde, 6–4, 6–2