Justin Arop (March 24, 1958 – 1994) was a track and field athlete from Uganda, who competed in the men's javelin throw event during his career.^[1] A two-time winner at the All-Africa Games (1978 and 1987) he represented his native East African country at three consecutive Summer Olympics, starting in Moscow, Soviet Union (1980). There he set his best Olympic result by finishing in 12th place in the overall-rankings.

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At the Lite Summer Games held at the Duke University Campus in Durham (North Carolina, USA), on June 27, 1982, Arop threw the javelin to a winning personal best of 84.58 meters (old design). He currently holds the Ugandan record with 75.52 m (new design).

• 1987 - 71.76
• 1988 - 75.72 NR