Lymm is a village and civil parish in the Borough of Warrington, Cheshire, England. It incorporates the hamlets of Booths Hill, Broomedge, Church Green, Deansgreen, Heatley, Heatley Heath, Little Heatley, Oughtrington, Reddish, Rushgreen and Statham. At the 2021 United Kingdom census it had a population of 12,700. The village is situated in the northern aspect of Cheshire and borders Greater Manchester to the East and lies 1 mile from the border of Salford to the north.

The Borough of Warrington is a unitary authority area with borough status in the ceremonial county of Cheshire, England. The borough is centred around the town of Warrington, and extends out into outlying villages of Lymm and Great Sankey and the town of Birchwood.