Haydock is a village within the Metropolitan Borough of St Helens, in Merseyside, England. Historically in Lancashire, it contains all of the Haydock electoral ward and a section of the Blackbrook electoral ward. The village is located roughly mid-way between Liverpool and Manchester and contains the junction of the M6 motorway and the A580 (East Lancashire Road). At the 2001 Census, the village had a population of 11,962, reducing to 11,416 at the 2011 Census.