Henry Elsynge (c.1606 – 30 September 1656) was an English administrator, who acted as clerk of the House of Commons, and wrote on parliamentary procedure.
Elsynge entered Christ Church, Oxford, as a commoner, in 1621, proceeding B.A.
After he spent seven years in foreign travel, Archbishop William Laud procured him the appointment of clerk of the House of Commons.
In December 1648, Elsynge resigned his appointment on a pretext, to avoid taking part in the proceedings against Charles I.
[1] Elsynge was a scholarly man who numbered Bulstrode Whitelocke and John Selden among his friends.