Grendon or "Grenrian" as the locals call it, is a small village and civil parish in rural Northamptonshire, England, on the borders of Bedfordshire and Buckinghamshire.

At the time of the 2011 census, the parish population was 544; the village is a popular place to live with commuters to London or Milton Keynes.

The village is mentioned in the Domesday Book of 1086, when Grendon formed part of the hundred of Wymersley, which covered an area of 52 square miles (130 km2).

Here it is listed as having three hides and one virgate and land enough for nine ploughs, twelve sochmen, three mills rendering 3 shillings, along with 30 acres of meadow.

[1] There is a village folklore about drunken revellers leaving the pub in olden days trying to fish the reflection of the moon from the brook; these characters became known as "Moonrakers".

The village has a parish church (St Mary's) which dates in part back to Norman times, and a thatched pub, the Half Moon, run by the Charles Wells brewery.

Inside the church, on each side of the chancel there are medieval wooden corbel carvings of the grotesque faces of a nagging wife and her leering husband - they are thought to have been a local couple.

There are three hatchments relating to the Compton family - one bearing ravens represents the arms of a former Lord Lieutenant of the Tower of London.

Pevsner describes it as a "...picturesque Tudor with an odd lantern with cupola ; handsome gabled with mullioned windows."