Restituta Joseph Kemi (born 30 July 1971 in Singida) is a Tanzanian long-distance runner. She twice carried the flag for Tanzania at the opening ceremony of the Summer Olympics: in 2000 and 2004.

She was the 1997 and 1999 winner of the Corrida de Langueux race.

• 800 metres - 2:08.31 min (1996)
• 1500 metres - 4:10.01 min (2001)
• 3000 metres - 8:44.28 min (2001)
• 5000 metres - 15:05.33 min (2001)
• 10,000 metres - 31:32.02 min (1999)
• Half marathon - 1:07:59 min (2000)
• Marathon - 2:43:52 min (2001)