Hellen Kimaiyo Kipkoskei (born September 8, 1968 in Moiben) is a retired runner from Kenya. She won many continental competitions. She competed at the 1984 Summer Olympics aged less than 16 and at the 1992 Summer Olympics. She is also a multiple Kenyan champion. In addition, she was a successful road runner. She won the Peachtree Road Race three times a row (1996–1998) and Dam tot Damloop four times a row (1992–1995). Kimaiyo won Zevenheuvelenloop in 1995. She won in 1994. She held the African records for 1500 and 3000 metres.