Daventry is a constituency^{[n 1]} in Northamptonshire represented in the House of Commons of the UK Parliament since 2010 by Chris Heaton-Harris of the Conservative Party, who has served as Secretary of State for Northern Ireland since 2022.

The seat, one of many created in 1918, was a narrower form of the oldest creation of South Northamptonshire and lasted 32 years until it reverted into "South Northamptonshire". Finally today's seat was recreated mostly from the north of the South Northants seat^{[n 2]} in 1974. Since its recreation and during its first existence, it has been served by Conservative MPs. As the 1997 majority was also not marginal, it has been to date an archetypal safe seat.

1918–1950: The Boroughs of Daventry and Brackley, the Rural Districts of Brackley, Crick, Daventry, Hardingstone, Middleton Cheney, Potterspury, and Towcester, and part of the Rural District of Northampton.

1974–1983: The Boroughs of Brackley and Daventry, and the Rural Districts of Brackley, Brixworth, Daventry, Northampton, and Towcester.^[2]

1983–1997: The District of Daventry wards of Abbey North, Abbey South, Badby, Barby, Brampton, Braunston, Byfield, Crick and West Haddon, Drayton, Everdon, Flore, Guilsborough, Hill, Kilsby, Long Buckby, Ravensthorpe, Spratton, Weedon, Welford, Woodford, and Yelvertoft, and the District of South Northamptonshire wards of Astwell, Blakesley, Brackley East, Brackley West, Cosgrove, Danvers, Deanshanger, Forest, Grafton, Greatworth, King's Sutton, Kingthorn, Middleton Cheney, Potterspury, Rainsborough, Slapton, Tove, Towcester, and Wardoun.

1997–2010: The District of Daventry wards of Abbey North, Abbey South, Badby, Barby, Brampton, Braunston, Byfield, Crick and West Haddon, Drayton, Everdon, Flore, Hill, Kilsby, Long Buckby, Ravensthorpe, Weedon, Woodford, and Yelvertoft, and the District of South Northamptonshire wards of Astwell, Blakesley, Blisworth, Brackley East, Brackley West, Bugbrooke, Cosgrove, Danvers, Deanshanger, Forest, Gayton, Grafton, Greatworth, Heyford, King's Sutton, Kingthorn, Middleton Cheney, Potterspury, Rainsborough, Slapton, Tove, Towcester, and Wardoun.

2010–2021: The District of Daventry, the District of South Northamptonshire wards of Cote, Downs, Grange, Harpole, and Heyford, and the Borough of Wellingborough wards of Earls Barton and West.

2021–present: The District of North Northamptonshire ward of Earls Barton (part) and the District of West Northamptonshire wards of Braunston and Crick; Brixworth, Bugbrooke (part) Daventry East, Daventry West, Long Buckby, Moulton, and Woodford and Weedon.

The constituency covers the west of Northamptonshire and is named for the market town of Daventry.