West Northamptonshire is a unitary authority area covering part of the ceremonial county of Northamptonshire, England, created in 2021.^[6] 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,^[7] and the grade I listed Althorp House and its estate.^[8]

West Northamptonshire was formed on 1 April 2021 through the merger of the three non-metropolitan districts of Daventry, Northampton, and South Northamptonshire, it absorbed the functions of these districts, plus those of the abolished Northamptonshire County Council.

In March 2018, following financial and cultural mismanagement by the cabinet and officers at Northamptonshire County Council, the then Secretary of State for Local Government, Sajid Javid, sent commissioner Max Caller into the council, who recommended the county council and all-district and borough councils in the county be abolished, and replaced by two unitary authorities, one covering the West, and one the North of the county.^[9] These proposals were approved in April 2019. It meant that the districts of Daventry, Northampton and South Northamptonshire were merged to form a new unitary authority called West Northamptonshire, whilst the second unitary authority North Northamptonshire consists of the former Corby, East Northamptonshire, Kettering and Wellingborough districts.^[10][11]

West Northamptonshire Council provides both county-level and district-level services. The whole area is also covered by civil parishes, which form a second tier of local government.^[16]

In terms of television, West Northamptonshire is served by BBC East and ITV Anglia with television signals received from the Sandy Heath transmitter. ^[26] However, some southwestern parts of the area such as Brackley is served by BBC South and ITV Meridian broadcasting from the Oxford TV transmitter. ^[27]

Radio stations for the area are:

For a county-wide list for Northamptonshire see List of places in Northamptonshire

West Northamptonshire is entirely covered by civil parishes, of which there are 166.^[28]

• Abthorpe, Adstone, Althorp, Arthingworth, Ashby St Ledgers, Ashton, Aston le Walls, Astrop, Aynho
• Badby, Barby, Blakesley, Blisworth, Boddington, Boughton, Brackley, Bradden, Brafield-on-the-Green, Braunston, Brington, Brixworth, Brockhall, Bugbrooke, Byfield
• Caldecote, Canons Ashby, Castle Ashby, Chacombe, Chapel Brampton, Charlton, Charwelton, Chipping Warden, Church Brampton, Church Stowe, Clay Coton Clipston, Cogenhoe, Cold Ashby, Cold Higham, Cosgrove, Coton, Cottesbrooke, Courteenhall, Creaton, Crick, Croughton, Culworth
• Daventry, Deanshanger, Denton, Dodford, Draughton
• East Farndon, East Haddon, Easton Neston, Edgcote, Elkington, Evenley, Everdon, Eydon
• Farthinghoe, Farthingstone, Flore, Fawsley
• Gayton, Grafton Regis, Grange Park, Great Brington, Great Oxendon, Greatworth, Greens Norton, Grimscote, Guilsborough
• Hackleton, Hanging Houghton, Hannington, Harlestone, Harpole, Hartwell, Haselbech, Hellidon, Helmdon, Hinton-in-the-Hedges, Holcot, Holdenby, Hollowell
• Kelmarsh, Kilsby, King's Sutton, Kislingbury
• Lamport, Lilbourne, Litchborough, Little Brington, Little Houghton, Long Buckby, Lower Catesby
• Maidford, Maidwell, Marston St. Lawrence, Marston Trussell, Middleton Cheney, Milton Malsor, Moreton Pinkney, Moulton
• Naseby, Nether Heyford, Newbottle, Newnham, Northampton, Norton
• Old, Old Stratford, Overthorpe, Overstone
• Passenham, Pattishall, Paulerspury, Pitsford, Potterspury, Preston Capes
• Quinton
• Radstone, Ravensthorpe, Roade, Rothersthorpe
• Scaldwell, Shutlanger, Sibbertoft, Silverstone, Slapton, Spratton, Stanford-on-Avon, Staverton, Stoke Bruerne, Sulby, Sulgrave, Syresham
• Teeton, Thenford, Thornby, Thorpe Mandeville, Tiffield, Towcester
• Upper Catesby, Upper Heyford, Upper Stowe
• Wappenham, Walgrave, Warkworth, Watford, Weedon Bec, Weedon Lois, Welford, Welton, West Haddon, Weston, Whilton, Whiston, Whitfield, Whittlebury, Wicken, Winwick, Woodend, Woodford Halse
• Yardley Gobion, Yardley Hastings, Yelvertoft

• 2019–2023 structural changes to local government in England
• 2021 West Northamptonshire Council election
• North Northamptonshire, another district created in Northamptonshire in April 2021.