1999 Grand Prix Hassan II
Date	22–29 March
Edition	15th
Category	World Series
Draw	32S / 16D
Prize money	$215,000
Surface	Clay / outdoor
Location	Casablanca, Morocco
Champions
Singles
Alberto Martín[1]
Doubles
Fernando Meligeni / Jaime Oncins[2]
← 1998 · Grand Prix Hassan II · 2000 →

The 1999 Grand Prix Hassan II was an Association of Tennis Professionals tennis tournament held in Casablanca, Morocco. It was the 15th edition of the Grand Prix Hassan II and was held from March 22 to March 29, 1999.

Finals

Singles

Alberto Martín defeated Fernando Vicente, 6–3, 6–4.

• It was Martin's 1st singles title of his career.

Doubles

Fernando Meligeni / Jaime Oncins defeated Massimo Ardinghi / Vincenzo Santopadre, 6–2, 6–3.

• It was Meligeni's only title of the year and the 10th of his career. It was Oncins's 2nd title of the year and the 6th of his career.