The A4012 is a road in the United Kingdom. It starts in the village of Husborne Crawley to the south east of Milton Keynes and heads southwest to the village of Woburn. Here it meets the A5130 and changes direction, heading southeast past Milton Bryan before crossing the A5 at right angles in the village of Hockliffe. After this it continues west on into the town of Leighton Buzzard. It finishes on encountering the A4146, the last stretch from Leighton town centre to the A4146 having been taken over from the former route of the A4146, which bypassed the town in 2007.