| Inns | HS |
| 226-5 | 45 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2018 |
| 204-9 | 43 | Somerset v Hampshire | The Cooper Associates County Ground, Taunton | 2017 |
| 200 | 49 | Somerset v Gloucestershire | County Ground, Bristol | 2006 |
| 199-6 | 48 | Somerset v Glamorgan | County Ground, Taunton | 2013 |
| 192-7 | 40 | Somerset v Warwickshire | Edgbaston, Birmingham | 2009 |
| 187-3 | 42 | Somerset v Essex | The Cloud County Ground, Chelmsford | 2023 |
| 185-7 | 43* | Somerset v Essex | The Cooper Associates County Ground, Taunton | 2021 |
| 183 | 46 | Somerset v Glamorgan | Sophia Gardens, Cardiff | 2005 |
| 181-3 | 49 | Somerset v Essex | The Cooper Associates County Ground, Taunton | 2016 |
| 180 | 41 | Somerset v Middlesex | Old Deer Park, Richmond | 2019 |
| 178-6 | 46 | Somerset v Middlesex | Lord's Cricket Ground, St John's Wood | 2018 |
| 177-3 | 48* | Somerset v Worcestershire | County Ground, Taunton | 2009 |
| 176-7 | 47 | Somerset v Worcestershire | County Ground, New Road, Worcester | 2008 |
| 175-8 | 46 | Somerset v Gloucestershire | County Ground, Taunton | 2014 |
| 174-6 | 49 | Somerset v Gloucestershire | County Ground, Taunton | 2015 |
| 173-6 | 44 | Somerset v Warwickshire | Edgbaston, Birmingham | 2008 |
| 172-4 | 49 | Somerset v Nottinghamshire | Trent Bridge, Nottingham | 2011 |
| 170-7 | 34* | Somerset v Sussex | The 1st Central County Ground, Hove | 2018 |
| 170-9 | 43 | Somerset v Kent | The Cooper Associates County Ground, Taunton | 2022 |
| 167-7 | 45 | Somerset v Warwickshire | County Ground, Taunton | 2006 |
| 167-8 | 39 | Somerset v Glamorgan | County Ground, Taunton | 2015 |
| 167-7 | 41 | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2016 |
| 167-8 | 48 | Somerset v Sussex | Edgbaston, Birmingham | 2018 |
| 164 | 44 | Somerset v Gloucestershire | County Ground, Bristol | 2019 |
| 164-7 | 36* | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2025 |
| 162-8 | 41* | Somerset v Northamptonshire | County Ground, Northampton | 2020 |
| 162-4 | 47* | Somerset v Sussex | The Cooper Associates County Ground, Taunton | 2024 |
| 161-8 | 39 | Somerset v Middlesex | Lord's Cricket Ground, St John's Wood | 2022 |
| 160-8 | 49 | Somerset v Worcestershire | County Ground, Taunton | 2013 |
| 158-5 | 40 | Somerset v Gloucestershire | Brightside Ground, Bristol | 2016 |
| 158-6 | 45* | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2017 |
| 157-9 | 38 | Somerset v Leicestershire | The Brit Oval, Kennington | 2005 |
| 157-9 | 47 | Somerset v Surrey | The Kia Oval, Kennington | 2019 |
| 156-4 | 46 | Somerset v Gloucestershire | County Ground, Bristol | 2010 |
| 154-8 | 48 | Somerset v Warwickshire | Edgbaston, Birmingham | 2007 |
| 154 | 34 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2023 |
| 153 | 34 | Somerset v Hampshire | Edgbaston, Birmingham | 2022 |
| 152 | 39 | Somerset v Glamorgan | The SSE SWALEC Stadium, Cardiff | 2016 |
| 152 | 45 | Somerset v Middlesex | The Cooper Associates County Ground, Taunton | 2021 |
| 151 | 39 | Somerset v Northamptonshire | County Ground, Northampton | 2003 |
| 151-9 | 40 | Somerset v Northamptonshire | County Ground, Northampton | 2006 |
| 151-9 | 31 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2015 |
| 150-7 | 40 | Somerset v Essex | County Ground, Taunton | 2014 |
| 150 | 42 | Somerset v Essex | The Cooper Associates County Ground, Taunton | 2023 |
