John Calvert may refer to:
John Calvert (1726–1804), British politician, MP for Tamworth, Wendover and Hertford John Calvert (died 1844) (c. 1758–1844), British politician, MP for Tamworth, Huntingdon, St Albans and Malmesbury John Calvert (magician) (1911–2013), American magician John Calvert Griffiths, attorney general of Hong Kong John Calvert (scholar), American scholar of Islamism at Creighton University