Ignatius Loyola Mascarenhas (3 June 1949) is a former Indian prelate of the Roman Catholic Church.
Mascarenhas was born in Mangalore, India. He was ordained a priest on 17 December 1977. He was appointed bishop to the Diocese of Simla and Chandigarh on 10 February 2009, and ordained bishop on 3 April 2009.
Pope Francis accepted his resignation on 12 April 2025.