Wilfred Kipkemboi Bungei is a Kenyan retired Middle-distance runner. He won a silver medal at the 1998 World Junior Championships in Athletics and another one in the 2001 World Championships in Athletics, in Edmonton.
Bungei represented his country at the 2004 Summer Olympics in Athens, Greece. He won the 800M gold medal at the 2008 Summer Olympics in Beijing, and the same at the World indoor Championships in Moscow 2006, defeating Mbulaeni Mulaudzi and Olympic Champion Yuriy Borzakovskiy.
During track season, Bungei is based near Verona, Italy. He was part of the 4 x 800M relay team which currently holds the world record.