The school draws its pupils from the town of Lanark and many villages in the local area, including Douglas, Carstairs and Braehead.

The Head Teacher is Jeff Warden, who took over in January 2022 following Mark Sherry who served 17 years in post.

The school has 6 houses: Lockhart, Jerviswood, Wallace, Hyndford, Braxfield and Clyde, pupils are sorted into these by tutor group upon the first day of term.

This building was large enough to accommodate both girls and boys, and Lanark Grammar School became a co-educational facility.

During this period a modular village structure was constructed using portacabins around the recently condemned old science building that was deemed unsafe after it was discovered that it contained asbestos.

Prior to the project, many school buildings were becoming unsafe and others had been built when class sizes were much larger.

Lanark Grammar now also contains an ASN wing in which pupils who have special teaching requirements can be educated.