William Fitzjames Oldham was a British-American bishop of the Methodist Episcopal Church and missionary bishop for South Asia. He distinguished himself as a missionary, an author and a church official. He was the founder of Anglo Chinese School in Singapore in 1886.

Anglo-Chinese School (ACS) is a family of Methodist schools in Singapore and Indonesia. It was founded in 1886 by Bishop William Fitzjames Oldham as an extension of the Methodist Episcopal Church. Its students and alumni are referred to as "ACSians". ACS was the first school in Singapore to have a flower named after it, the "Ascocenda Anglo-Chinese School orchid", a hybrid created by the school to mark its 116th Founder's Day on 1 March 2002.