Zacheus Isham (1651–1705) was a Church of England clergyman and religious author.
[1][2] He matriculated in 1666 from Christ Church, Oxford, eventually earning his B.A.
After completing his third degree in 1671, he served for a while as tutor to his cousin Sir Thomas Isham, Bt., accompanying Sir Thomas to Italy and elsewhere, where they collected many art works that are on display today at Lamport Hall in Northamptonshire.
Isham became an interlocutor in 1679 at the Oxford divinity school, and was the speaker in 1683 of an oration honoring Sir Thomas Bodley.
He was subsequently appointed about 1685 as chaplain to Henry Compton, the bishop of London, became a prebendary (canon) in 1685–6 at St. Paul's Cathedral, and was installed in 1691 as a canon at Canterbury Cathedral.