Sir Alexander Phillips Muddiman KCSI CIE (14 February 1875 – 17 July 1928) was a British administrator in India.
Muddiman was born in Leighton Buzzard, Bedfordshire, England, and was educated at Wimborne School and University College, London.
He joined the Indian Civil Service in 1897 and was posted to Bengal Presidency in 1899 as an assistant collector and magistrate in Bihar.
In March 1924 he was appointed Home Member of the Government of India and Leader of the Legislative Assembly, the lower house of the Legislature.
At the end of 1927 he was appointed Governor of the United Provinces, but he was already a sick man and in July 1928 he died of heart failure at Naini Tal.