Roger Maynwaring (Mainwaring, Manwaring) (1590–1653) was an English bishop, known for his support for absolutism.
Maynwaring was born in Shropshire, and educated at Worcester grammar, and All Souls College, Oxford. He became rector of St Giles in the Fields in 1616.
Maynwaring was appointed a royal chaplain in 1626. He preached in favour of the royal prerogative at the time of the forced loan confrontation of 1627, speaking of the hazard of damnation of those who resisted the royal command, when it came to raising taxes, or forced loans, a burning topic at the time. He also implied that the consent of Parliament to taxation wasn't a requirement. The doctrine involved was not innovative, since it drew on the writings of Lancelot Andrewes, Marc' Antonio de Dominis, and Hadrian Saravia. But, in context, the application to taxes was particularly pointed. Others preached in the same way, including Isaac Bargrave and Matthew Wren.
These addresses added fuel to an existing controversy, and created tension at a time of political strain. King Charles I had wished to have related sermons by Robert Sibthorpe printed; but George Abbot, the Archbishop of Canterbury, resisted. Making use of William Laud and other bishops, Charles had his way. In fact Laud had prompted Maynwaring to his topic, and pressed George Montaigne to license for publication both Sibthorpe’s and Maynwaring’s texts, as Religion and Alegiance [sic] (1627).