| Country: | England |
| Official Name: | Thornby |
| Coordinates: | 52.3734°N -1.0101°W |
| Population: | 189 |
| Population Ref: | (2011) |
| Unitary England: | West Northamptonshire |
| Lieutenancy England: | Northamptonshire |
| Region: | East Midlands |
| Constituency Westminster: | Kettering |
| Post Town: | Northampton |
| Postcode District: | NN6 |
| Postcode Area: | NN |
| Dial Code: | 01604 |
| Os Grid Reference: | SP6775 |
Thornby is a village and civil parish in West Northamptonshire in England. It has a Manor house. At the time of the 2001 census, the parish's population was 162 people,[1] increasing to 189 at the 2011 Census.[2] The village is bisected by the A5199 (formerly A50) road between Northampton and Leicester and about 11miles north-west of Northampton town centre. It is about 1½ miles (2½ km) south of a junction with the A14 road which joins the M1 Motorway and M6 junction at Catthorpe with Felixstowe, Suffolk.
The village's name means 'farm/settlement with thorn trees'.[3]
The parish church is dedicated to St. Helen and is described by Pevsner as of little architectural interest. It dates from the 14th century and additions and re-building took place in 1870 by E F Law.[4]
Thornby Hall is located off Naseby road and carries 17th century, with 19th- and 20th-century additions, for its Tudor style. The house and grounds were used as a school for young people with severe emotional and behavioural problems, as a result of attachment difficulties which may have been rooted in early life trauma. It is now closed and been sold.[5] In 2017, Thornby Hall became home to Nagarjuna Kadampa Meditation Centre, a Kadampa Buddhist community and public meditation centre.
Stone House is c. 1700 and Thornby Grange was built in 1911 in the Stuart style.[4]