Pascal Ondarts (born 1 April 1956) is a former French Basque rugby union player.

He was considered by The Times one of the 10 most frightening French players ever to represent his National Team.

He had 42 caps for France, scoring 1 try, 4 points in aggregate, from a 16-3 win over New Zealand, at 15 November 1986, in Nantes, in a friendly.

He participated in 5 editions of the Five Nations Championship, in 1987, 1988, 1989, 1990 and 1991, being a winner in 1987, with a Grand Slam, 1988, ex-aequo with Wales, and 1989.

He played at the 1987 Rugby World Cup, where France lost the final to New Zealand by 29-9, but missed the final, and at the 1991 Rugby World Cup, where he had his last game for his National Team, at 19 October 1991, in the 10-19 loss to England, at the quarter-finals, aged 35 years old.