Charles Donald Adams (20 December 1928 – 8 April 1996) was an English opera singer and actor, best known for his performances in bass-baritone roles of the Savoy operas with the D'Oyly Carte Opera Company and his own company, Gilbert and Sullivan for All.

Adams began his career with the BBC Repertory Company in 1944. Among other early performances, he was leading man for two years at the Little Theatre, Great Yarmouth. In 1951, he joined the D'Oyly Carte organisation and soon began to play roles, becoming the company's principal bass until 1969. With Thomas Round and Norman Meadmore, he formed the touring company, Gilbert and Sullivan for All, in which he continued to sing bass and bass-baritone roles as well as directing. By the early 1980s, Adams was performing in opera and operetta throughout Britain and abroad, continuing nearly until his death. He recorded many of his roles, particularly his Gilbert and Sullivan repertoire.