Lieutenant General Joshua Mahamadu Hamidu (1936 – 1 February 2021) was a Ghanaian soldier, politician and diplomat. He has been the Chief of Defence Staff and also member of the Supreme Military Council government. Prior to heading the military and being in government, he was the Ghanaian High Commissioner to Zambia. He was appointed National Security Advisor to the Kufuor government in 2001. He was the chairman of the Narcotics Control Board of Ghana and on various boards of the Bank of Ghana. In 2005, he was Ghana's High Commissioner to Nigeria.