Hamon L'Estrange (1605–1660) was an English writer on history, theology and liturgy, of Calvinist views, loyal both to Charles I and the Church of England. Along with Edward Stephens (d. 1706), he contributed to the seventeenth-century revival of interest in ancient liturgies; with John Cosin and Anthony Sparrow he began the genre of commentary on the Book of Common Prayer. He has been confused at times with his father, son and grandson of the same name.
L'Estrange was baptised at Sedgeford, Norfolk, 29 August 1605, the second son of Sir Hamon L'Estrange (1583–1654) of Hunstanton, Norfolk and his wife Anne Stubbe, daughter of Richard Stubbe, of Sedgeford, Norfolk. He was admitted to Gray's Inn 12 August 1617, but does not appear to have been called to the bar. His life was mainly devoted to theological study. He maintained a Calvinistic sentiment at a time when Laud and several of his circle were wary of Calvinism.
On the outbreak of the First English Civil War he was a royalist, as were other family members. He was sent for as a delinquent for affronting the parliamentary committee of the county of Norfolk. With his father and brother he was embroiled in the attempted delivery of King's Lynn to the royal forces (August 1643); a little later he was ranked as colonel in the royal army. He speaks of having undergone an eight years' sequestration, apparently between 1643 and 1651. Writing to Edward Montagu, 2nd Earl of Manchester, 31 August 1644, he spoke of being reconciled to the sense of the parliament. From 1651 onwards he probably lived undisturbed and in comparative comfort at Ringstead, Norfolk and elsewhere. He died 7 August 1660, and was buried at Pakenham, Suffolk.