| Extras |
| 37 | Warwickshire v Northamptonshire | County Ground, Northampton | 2003 |
| 26 | Warwickshire v Northamptonshire | County Ground, Northampton | 2009 |
| 23 | Leicestershire v Northamptonshire | Grace Road, Leicester | 2011 |
| 22 | Somerset v Northamptonshire | County Ground, Taunton | 2004 |
| 22 | Durham v Northamptonshire | Emirates Riverside, Chester-le-Street | 2018 |
| 19 | Leicestershire v Northamptonshire | Grace Road, Leicester | 2010 |
| 19 | Worcestershire v Northamptonshire | County Ground, Northampton | 2021 |
| 19 | Leicestershire v Northamptonshire | County Ground, Northampton | 2023 |
| 18 | Glamorgan v Northamptonshire | County Ground, Northampton | 2004 |
| 18 | Yorkshire v Northamptonshire | County Ground, Northampton | 2014 |
| 18 | Somerset v Northamptonshire | County Ground, Northampton | 2024 |
| 17 | Yorkshire v Northamptonshire | Headingley, Leeds | 2016 |
| 17 | Leicestershire v Northamptonshire | County Ground, Northampton | 2018 |
| 16 | Warwickshire v Northamptonshire | Edgbaston, Birmingham | 2006 |
| 16 | Essex v Northamptonshire | The Ford County Ground, Chelmsford | 2008 |
| 16 | Glamorgan v Northamptonshire | The SWALEC Stadium, Cardiff | 2009 |
| 16 | Worcestershire v Northamptonshire | County Ground, Northampton | 2010 |
| 16 | Derbyshire v Northamptonshire | County Ground, Derby | 2010 |
| 16 | Somerset v Northamptonshire | County Ground, Taunton | 2013 |
| 16 | Durham v Northamptonshire | Emirates Riverside, Chester-le-Street | 2017 |
| 16 | Warwickshire v Northamptonshire | County Ground, Northampton | 2023 |
| 15 | Somerset v Northamptonshire | County Ground, Northampton | 2003 |
| 15 | Warwickshire v Northamptonshire | Edgbaston, Birmingham | 2007 |
| 15 | Worcestershire v Northamptonshire | County Ground, Northampton | 2013 |
| 15 | Derbyshire v Northamptonshire | The Incora County Ground, Derby | 2022 |
| 14 | Warwickshire v Northamptonshire | Edgbaston, Birmingham | 2004 |
| 14 | Durham v Northamptonshire | County Ground, Northampton | 2010 |
| 14 | Derbyshire v Northamptonshire | County Ground, Northampton | 2015 |
| 14 | Durham v Northamptonshire | Emirates Riverside, Chester-le-Street | 2016 |
| 14 | Durham v Northamptonshire | County Ground, Northampton | 2017 |
