Milton Malsor is a village and civil parish in West Northamptonshire, England. The population of the civil parish at the 2011 census was 761. It is 4 miles (6.4 km) south of Northampton town centre, 45 miles (72 km) south-east of Birmingham, and 66 miles (106 km) north of central London; junction 15 of the M1 motorway is 2 miles (3.2 km) east by road. The area of the Milton Malsor civil parish is about 1,650 acres (670 ha), stretching from north of the M1 motorway between junctions 15 and 15A, south to the West Coast Main Line, east to the A508 and A45 roads, and west to the A43 road.

West Northamptonshire is a unitary authority area covering part of the ceremonial county of Northamptonshire, England, created in 2021. By far the largest settlement in West Northamptonshire is the county town of Northampton. Its other significant towns are Daventry, Brackley and Towcester; the rest of the area is predominantly agricultural villages though it has many lakes and small woodlands and is passed through by the West Coast Main Line and the M1 and M40 motorways. The district includes the site of the Roman town of Bannaventa, and the grade I listed Althorp House and its estate.