John Anthony Emmanuel Amaratunga (Sinhala: ජෝන් ඇන්තනී එමානුවෙල් අමරතුංග) (born 21 May 1940) is a Sri Lankan politician and lawyer.

He resides in Kandana.He was the minister Tourism Development, Christian Religious Affairs and Land in the United National Party led government.

In 1978, while serving as chairman, Sri Lanka Leather Corporation; he succeeded Shelton Jayasinghe, Minister of Posts and Telecommunications as the Member of Parliament for the Wattala electorate following the sudden death of the later.

During his political career he held several appointments that included; In 2018 John Amaratunga was accused of aiding the fraudulent acquisition of a property worth Rs.

John Amaratunga accepted that the accused was a friend but denied the allegations that he abused his powers to stop the investigations or that to threatening the lawyers.