Warrington is a hamlet and civil parish[2] in the unitary authority area of the City of Milton Keynes, Buckinghamshire, England, near Olney and on either side of the A509.

At the 2011 Census the population of the hamlet was included in the civil parish of Lavendon.

The hamlet name is an Old English language word that means 'Wærheard's estate'.

It is the most northerly civil parish in the Milton Keynes UA, of Buckinghamshire and of the South East England Region.

Media related to Warrington, Buckinghamshire at Wikimedia Commons