1999 Monte Carlo Open
Date	19–25 April
Edition	93rd
Category	ATP Super 9
Draw	56S / 28D
Prize money	$2,220,000
Surface	Clay / outdoor
Location	Roquebrune-Cap-Martin, France
Venue	Monte Carlo Country Club
Champions
Singles
Gustavo Kuerten[1]
Doubles
Olivier Delaître / Tim Henman[2]
← 1998 · Monte Carlo Open · 2000 →

The 1999 Monte Carlo Open was a men's tennis tournament played on outdoor clay courts. It was the 93rd edition of the Monte Carlo Open, and was part of the ATP Super 9 of the 1999 ATP Tour. It took place at the Monte Carlo Country Club in Roquebrune-Cap-Martin, France, near Monte Carlo, Monaco, from 19 April through 25 April 1999.

Thirteenth-seeded Gustavo Kuerten won the singles title.

Finals

Singles

Gustavo Kuerten defeated Marcelo Ríos, 6–4, 2–1, retired

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

Doubles

Olivier Delaître / Tim Henman defeated Jiří Novák / David Rikl, 6–2, 6–3