In the late 15th and early 16th centuries, the vicars of Lelant resisted the demands of the inhabitants of Towednack and St Ives for rights of sepulture in those places.

[5] Like many other churches in Cornwall, St Uny has a copy of a letter from King Charles thanking the people of Lelant for their support during the English Civil War.

upon all hallow day late paste about the mydds of the service in the parish church of Lalant Moryshe David’s wife and Cicely James came into the church of Lalant together and in chiding with words together Cycely called Agnes Davey whore and whore bitch in English and not in Cornowok."

In 1731 there is an entry in the churchwardens' records of payment of one shilling for one day's work of carrying sand out of the church.

On examining the tower it was noticed that the flooring of the bell-chamber was rotten and had almost disappeared; the bells were supported by the frame alone.

A new organ was installed in the north chancel by John Hele of London, Exeter and Plymouth at a cost of £415 (equivalent to £51,600 in 2023)[11] and opened on 13 May 1913.