The A413 is a major road in England that runs between Gerrards Cross (west of London) to Towcester (northwest of Milton Keynes). It passes through or near various towns and villages including (in northbound order) Amersham, Great Missenden, Wendover, Aylesbury, Winslow, and Buckingham. Most of the road is in Buckinghamshire, with a part at the north end in Northamptonshire.