St Mary's Hospital is a health facility on London Road in Kettering, Northamptonshire, England.

It is managed by Northamptonshire Healthcare NHS Foundation Trust.

The facility, which was designed by Sir George Gilbert Scott, opened as the Kettering Union Workhouse in 1838.

[1] An infirmary was added to the east of the main building in the mid-1890s.

[3] The Welland Centre, a mental health unit which was procured under a Private Finance Initiative contract, opened in 2005.