Lisa Frances Ondieki (née O'Dea, formerly Martin;[1][2] born 12 May 1960) is an Australian former long-distance runner.

[3] She was originally a 400 m hurdler, and she competed in middle-distance events in the AIAW for the Oregon Ducks track and field team.

She won the gold medal in the marathon at the 1986 Commonwealth Games in Edinburgh in a personal best of 2:26:07, with New Zealand's Lorraine Moller in second.

In a solo performance, she finished over seven minutes ahead of silver medallist Australian team-mate Tani Ruckle.

[1] Divorced from Martin, she married Kenyan distance runner Yobes Ondieki in 1990 and missed the rest of that season due to pregnancy, giving birth to their daughter in November 1990.

In January 1992, she finished second in the Tokyo Half Marathon, running a lifetime best of 68:33, in a race won by McColgan in 67:11.

In 1996, now divorced from Ondieki, she ran her fastest marathon time for three years with 2:30:57 in Osaka, to earn selection for her fourth and final Olympics.