William Ronkorua Ole Ntimama was a Kenyan politician. He was a staunch supporter of the ruling party KANU, prior to the adoption of the multiparty politics in Kenya in 1990. Ole Ntimama was vocal against multi party politics like many diehard Kanu supporters around that time. However, after the advent of multipartism, he decamped from KANU and joined the Democratic Party (DP), then headed by retired President Mwai Kibaki. Ole Ntimama later joined the Orange Democratic Movement ODM during the 2007 general elections. He remained in ODM and was elected to represent the Narok North Constituency in the National Assembly of Kenya since the 2007 Kenyan parliamentary election.