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Sir Philip Mainwaring (1589 – 2 August 1661) was an English politician who sat in the House of Commons variously between 1625 and 1661.

Mainwaring was the son of Randall Mainwaring, of Peover, Cheshire. He was admitted at Gray's Inn on 14 March 1609, and matriculated at Cambridge from Brasenose College, Oxford on 29 August 1610. He was awarded BA from Oxford in 1613 and entered Lincoln's Inn on 15 February 1614. In 1624 he was awarded MA at Cambridge on visit of King Charles.[1]

Mainwaring was elected Member of Parliament for Boroughbridge in 1625 and 1626. He was elected MP for Derby in 1628 and sat to 1629 when King Charles decided to rule without parliament for eleven years.[2]

Van Dyck's double portrait of Sir Philip Mainwaring (right) with the Earl of Strafford

In 1634 Mainwaring became Principal Secretary to the Lord Deputy of Ireland, Lord Strafford. Strafford's biographer refers to him as a "court hanger-on" who was disliked by many of Strafford's friends, but who had provided him with useful intelligence in the past, and who justified the Earl's trust by proving a diligent and loyal official, who remained faithful to his employer.[3]

He was knighted at Dublin Castle on 13 July 1634. He was an MP in the Irish House of Commons for Clonakilty from 1634 to 1635 and for Carysfort from 1640 to 1641.[1]

Mainwaring was elected MP for Morpeth for the Short Parliament in April 1640.[2] He was imprisoned in 1650.

In December 1660, Mainwaring was appointed to the Irish Privy Council. He was then elected MP for Newton in the Cavalier Parliament in 1661, but died later that year.[4]


  1. ^ a b "Mainwaring, Philip (MNRN624P)". A Cambridge Alumni Database. University of Cambridge.
  2. ^ a b Willis, Browne (1750). Notitia Parliamentaria, Part II: A Series or Lists of the Representatives in the several Parliaments held from the Reformation 1541, to the Restoration 1660 ... London. pp. onepage&q&f&#61, false 229–239.
  3. ^ Wedgwood, C.V. Thomas Wentworth, 1st Earl of Strafford 1593-1641- a revaluation Phoenix Press reissue 2000 p.135
  4. ^ Leigh Rayment's Historical List of MPs – Constituencies beginning with "N" (part 2)
Parliament of England
Preceded by
William Mainwaring
Sir Ferdinando Fairfax
Member of Parliament for Boroughbridge
With: Sir Ferdinando Fairfax
Succeeded by
Sir Ferdinando Fairfax
Francis Neville
Preceded by
Sir Henry Crofts
John Thoroughgood
Member of Parliament for Derby
With: Timothy Leeving
No Parliaments summoned until 1640
Title next held by
William Allestry
Preceded by
John Vaughan
Richard Legh
Member of Parliament for Newton
June–October 1661
With: Richard Legh
Succeeded by
Richard Legh
The Lord Gorges of Dundalk
Parliament of Ireland
Preceded by
Sir Edward Harris
Henry Gosnold
Member of Parliament for Clonakilty
With: Sir Robert Travers
Succeeded by
Sir Robert Travers
Peregrine Banastre
Preceded by
Walter Loftus
Francis Crosbie
Member of Parliament for Carysfort
With: Francis Crosbie
Succeeded by
Protectorate Parliament