Joseph Nyagah (born 1948) is a Kenyan politician and the Minister of Cooperative Development and Marketing in Kenya's grand coalition government.
Nyagah was a member of the then governing Kenya African National Union and a minister in President Daniel Arap Moi's office until quitting both the ministry and the party in the run-up to the 2002 general election. He fought the election in Gachoka Constituency as an opposition National Rainbow Coalition candidate He was a member of Orange Democratic Movement's 'Pentagon' in the lead up to the 2007 general election.
His LinkedIn profile refers to him as a "Cabinet Member at Government of Kenya".
He is the son of former government minister, and Gachoka Constituency Member of Parliament Jeremiah Nyagah.