| Inns | HS |
| 265-5 | 93 | Somerset v Derbyshire | The Cooper Associates County Ground, Taunton | 2022 |
| 241-5 | 96* | Somerset v Hampshire | The Cooper Associates County Ground, Taunton | 2024 |
| 235-5 | 59 | Somerset v Middlesex | County Ground, Taunton | 2011 |
| 235-5 | 76 | Somerset v Middlesex | The Cooper Associates County Ground, Taunton | 2025 |
| 231-4 | 94 | Somerset v Gloucestershire | Seat Unique Stadium, Bristol | 2023 |
| 229-6 | 62 | Somerset v Middlesex | The Cooper Associates County Ground, Taunton | 2018 |
| 229-8 | 60 | Somerset v Worcestershire | Edgbaston, Birmingham | 2020 |
| 228-5 | 53 | Somerset v Gloucestershire | County Ground, Taunton | 2005 |
| 226-5 | 45 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2018 |
| 225-6 | 56 | Somerset v Essex | The Cloudfm County Ground, Chelmsford | 2019 |
| 225-6 | 90 | Somerset v Essex | The Cooper Associates County Ground, Taunton | 2025 |
| 224-6 | 68 | Somerset v Kent | The Cooper Associates County Ground, Taunton | 2025 |
| 221-7 | 61 | Somerset v Kent | The Cooper Associates County Ground, Taunton | 2023 |
| 220-4 | 78 | Somerset v Hampshire | County Ground, Taunton | 2010 |
| 219-5 | 78 | Somerset v Glamorgan | County Ground, Taunton | 2006 |
| 218-8 | 98 | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2022 |
| 215-3 | 75 | Somerset v Northamptonshire | County Ground, Northampton | 2024 |
| 212-3 | 71 | Somerset v Glamorgan | County Ground, Taunton | 2005 |
| 211-5 | 56 | Somerset v Northamptonshire | County Ground, Taunton | 2004 |
| 210-6 | 94 | Somerset v Worcestershire | County Ground, Taunton | 2005 |
| 210-8 | 72 | Somerset v Glamorgan | The Cooper Associates County Ground, Taunton | 2018 |
| 209-5 | 60* | Somerset v Nottinghamshire | The Cooper Associates County Ground, Taunton | 2018 |
| 209-7 | 68 | Somerset v Hampshire | The Cooper Associates County Ground, Taunton | 2025 |
| 208-5 | 84 | Somerset v Surrey | The Kia Oval, Kennington | 2023 |
| 207-9 | 59 | Somerset v Middlesex | Uxbridge Cricket Club Ground, Uxbridge | 2017 |
| 207-2 | 71 | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2019 |
| 204-5 | 83 | Somerset v Middlesex | County Ground, Taunton | 2010 |
| 204-9 | 43 | Somerset v Hampshire | The Cooper Associates County Ground, Taunton | 2017 |
| 204-7 | 68 | Somerset v Kent | The Cooper Associates County Ground, Taunton | 2021 |
| 202-6 | 88 | Somerset v Glamorgan | County Ground, Taunton | 2007 |
| 200 | 49 | Somerset v Gloucestershire | County Ground, Bristol | 2006 |
| 200-7 | 76 | Somerset v Northamptonshire | County Ground, Taunton | 2007 |
| 200-4 | 95* | Somerset v Gloucestershire | County Ground, Taunton | 2010 |
| 199-6 | 48 | Somerset v Glamorgan | County Ground, Taunton | 2013 |
| 197-3 | 53 | Somerset v Glamorgan | Sophia Gardens, Cardiff | 2003 |
| 197-7 | 91 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2016 |
| 197-6 | 64 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2017 |
| 197-7 | 57 | Somerset v Hampshire | The Cooper Associates County Ground, Taunton | 2018 |
| 197-6 | 55 | Somerset v Essex | The Cooper Associates County Ground, Taunton | 2024 |
| 197-6 | 68 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2024 |
| 194-4 | 72* | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2018 |
| 194-2 | 85* | Somerset v Essex | The Cloud County Ground, Chelmsford | 2022 |
| 194-9 | 55 | Somerset v Hampshire | The Cooper Associates County Ground, Taunton | 2022 |
| 194-6 | 77* | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2024 |
| 193-8 | 66 | Somerset v Glamorgan | County Ground, Taunton | 2004 |
| 193-8 | 86 | Somerset v Glamorgan | The Cooper Associates County Ground, Taunton | 2024 |
| 192-7 | 40 | Somerset v Warwickshire | Edgbaston, Birmingham | 2009 |
| 192-6 | 89* | Somerset v Gloucestershire | County Ground, Taunton | 2013 |
| 192-8 | 82 | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2020 |
| 191-6 | 69 | Somerset v Warwickshire | County Ground, Taunton | 2012 |
| 190-5 | 72 | Somerset v Warwickshire | County Ground, Taunton | 2009 |
| 190-5 | 59 | Somerset v Glamorgan | Sophia Gardens, Cardiff | 2018 |
| 189-4 | 77* | Somerset v Kent | The Kent County Cricket Ground, Beckenham | 2010 |
| 189-4 | 86* | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2016 |
| 189-3 | 84* | Somerset v Hampshire | The Ageas Bowl, Southampton | 2017 |
| 188-6 | 97 | Somerset v Northamptonshire | County Ground, Taunton | 2006 |
| 188-4 | 80 | Somerset v Worcestershire | County Ground, New Road, Worcester | 2013 |
| 188-4 | 79 | Somerset v Gloucestershire | Seat Unique Stadium, Bristol | 2024 |
| 187-6 | 69 | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2021 |
| 187-3 | 42 | Somerset v Essex | The Cloud County Ground, Chelmsford | 2023 |
| 187-6 | 78 | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2023 |
| 185-3 | 76* | Somerset v Glamorgan | Sophia Gardens, Cardiff | 2006 |
| 185-6 | 79 | Somerset v Glamorgan | County Ground, Taunton | 2008 |
| 185-7 | 43* | Somerset v Essex | The Cooper Associates County Ground, Taunton | 2021 |
| 185-3 | 78* | Somerset v Lancashire | The Cooper Associates County Ground, Taunton | 2021 |
| 184-6 | 60* | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2022 |
| 184-5 | 72 | Somerset v Sussex | The 1st Central County Ground, Hove | 2023 |
| 183 | 46 | Somerset v Glamorgan | Sophia Gardens, Cardiff | 2005 |
| 183-3 | 58 | Somerset v Middlesex | County Ground, Taunton | 2014 |
| 183-7 | 90 | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2021 |
| 183-4 | 51 | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2024 |
| 182-5 | 60 | Somerset v Nottinghamshire | The Rose Bowl, Southampton | 2010 |
| 182-6 | 87 | Somerset v Glamorgan | The Cooper Associates County Ground, Taunton | 2017 |
| 181-3 | 49 | Somerset v Essex | The Cooper Associates County Ground, Taunton | 2016 |
| 181-2 | 64 | Somerset v Glamorgan | Sophia Gardens, Cardiff | 2019 |
| 181-5 | 70* | Somerset v Glamorgan | Sophia Gardens, Cardiff | 2021 |
| 180 | 41 | Somerset v Middlesex | Old Deer Park, Richmond | 2019 |
| 179-6 | 52 | Somerset v Hampshire | Utilita Bowl, Southampton | 2025 |
| 178-6 | 51 | Somerset v Worcestershire | County Ground, Taunton | 2004 |
| 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 |
| 177-4 | 78 | Somerset v Essex | The Ford County Ground, Chelmsford | 2010 |
| 177-4 | 87* | Somerset v Sussex | County Ground, Taunton | 2011 |
| 177-7 | 92 | Somerset v Essex | The Essex County Ground, Chelmsford | 2015 |
| 177-1 | 89* | Somerset v Middlesex | Uxbridge Cricket Club Ground, Uxbridge | 2015 |
| 177-9 | 81 | Somerset v Surrey | The Kia Oval, Kennington | 2017 |
| 177-6 | 70 | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2018 |
| 177-8 | 63 | Somerset v Glamorgan | The Cooper Associates County Ground, Taunton | 2019 |
| 176-7 | 69 | Somerset v Northamptonshire | County Ground, Taunton | 2008 |
| 176-7 | 47 | Somerset v Worcestershire | County Ground, New Road, Worcester | 2008 |
| 176-4 | 76 | Somerset v Hampshire | County Ground, Taunton | 2014 |
| 175-7 | 84 | Somerset v Gloucestershire | County Ground, Bristol | 2009 |
| 175-6 | 58 | Somerset v Essex | County Ground, Taunton | 2012 |
| 175-5 | 76 | Somerset v Warwickshire | Edgbaston, Birmingham | 2013 |
| 175-8 | 46 | Somerset v Gloucestershire | County Ground, Taunton | 2014 |
| 175-9 | 63 | Somerset v Kent | The Cooper Associates County Ground, Taunton | 2016 |
| 174-6 | 49 | Somerset v Gloucestershire | County Ground, Taunton | 2015 |
| 174 | 59 | Somerset v Sussex | The 1st Central County Ground, Hove | 2016 |
| 174-1 | 94* | Somerset v Glamorgan | The Cooper Associates County Ground, Taunton | 2022 |
| 174-9 | 72 | Somerset v Glamorgan | The Cooper Associates County Ground, Taunton | 2025 |
| 173-6 | 44 | Somerset v Warwickshire | Edgbaston, Birmingham | 2008 |
| 173-6 | 71 | Somerset v Hampshire | The Rose Bowl, Southampton | 2010 |
| 173-2 | 85* | Somerset v Hampshire | County Ground, Taunton | 2015 |
| 173-6 | 52 | Somerset v Hampshire | The Ageas Bowl, Southampton | 2023 |
| 172-3 | 58 | Somerset v Glamorgan | County Ground, Taunton | 2011 |
| 172-4 | 49 | Somerset v Nottinghamshire | Trent Bridge, Nottingham | 2011 |
| 172-3 | 95* | Somerset v Hampshire | The Cooper Associates County Ground, Taunton | 2019 |
| 172-9 | 77 | Somerset v Hampshire | The Cooper Associates County Ground, Taunton | 2021 |
| 172-2 | 66 | Somerset v Glamorgan | Sophia Gardens, Cardiff | 2023 |
| 171-5 | 83 | Somerset v Sussex | The Cooper Associates County Ground, Taunton | 2019 |
| 170-4 | 72* | Somerset v Gloucestershire | County Ground, Taunton | 2011 |
| 170-8 | 79 | Somerset v Sussex | County Ground, Taunton | 2015 |
| 170-7 | 51 | Somerset v Surrey | The Kia Oval, Kennington | 2015 |
| 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 |
| 169 | 70 | Somerset v Warwickshire | County Ground, Taunton | 2003 |
| 169-7 | 58 | Somerset v Surrey | The Kia Oval, Kennington | 2011 |
| 169-4 | 94* | Somerset v Glamorgan | County Ground, Taunton | 2014 |
| 169 | 74 | Somerset v Sussex | The Cooper Associates County Ground, Taunton | 2022 |
| 169-3 | 64 | Somerset v Sussex | The 1st Central County Ground, Hove | 2025 |
| 167-7 | 45 | Somerset v Warwickshire | County Ground, Taunton | 2006 |
| 167-9 | 74 | Somerset v Essex | County Ground, Taunton | 2010 |
| 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 |
| 167-9 | 53 | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2023 |
| 166-1 | 89* | Somerset v Kent | The Nevill Ground, Tunbridge Wells | 2011 |
| 166-5 | 63 | Somerset v Gloucestershire | County Ground, Bristol | 2015 |
| 166-5 | 63 | Somerset v Middlesex | The Cooper Associates County Ground, Taunton | 2017 |
| 166-2 | 81* | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2022 |
| 165-8 | 60 | Somerset v Worcestershire | The Cooper Associates County Ground, Taunton | 2020 |
| 165-2 | 81* | Somerset v Gloucestershire | County Ground, Bristol | 2021 |
| 164 | 44 | Somerset v Gloucestershire | County Ground, Bristol | 2019 |
| 164-7 | 36* | Somerset v Gloucestershire | The Cooper Associates County Ground, Taunton | 2025 |
| 163-3 | 83* | Somerset v Northamptonshire | County Ground, Northampton | 2009 |
| 163-4 | 70 | Somerset v Sussex | Arundel Castle Cricket Club Ground, Arundel | 2014 |
| 162-8 | 41* | Somerset v Northamptonshire | County Ground, Northampton | 2020 |
| 162-4 | 47* | Somerset v Sussex | The Cooper Associates County Ground, Taunton | 2024 |
| 161-3 | 50 | Somerset v Sussex | County Ground, Taunton | 2010 |
| 161-7 | 50 | Somerset v Gloucestershire | County Ground, Bristol | 2020 |
| 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 |
| 159-6 | 61 | Somerset v Surrey | County Ground, Taunton | 2014 |
| 159-5 | 84* | Somerset v Glamorgan | The SSE SWALEC Stadium, Cardiff | 2015 |
| 159-6 | 57 | Somerset v Kent | The Cooper Associates County Ground, Taunton | 2018 |
| 159-4 | 78 | Somerset v Surrey | Edgbaston, Birmingham | 2024 |
| 158-5 | 89* | Somerset v Middlesex | Lord's Cricket Ground, St John's Wood | 2010 |
| 158-5 | 40 | Somerset v Gloucestershire | Brightside Ground, Bristol | 2016 |
| 158-6 | 45* | Somerset v Surrey | The Cooper Associates County Ground, Taunton | 2017 |
| 158-5 | 57* | Somerset v Nottinghamshire | The Cooper Associates County Ground, Taunton | 2023 |
| 158-1 | 79* | Somerset v Hampshire | Utilita Bowl, Southampton | 2024 |
| 157-9 | 38 | Somerset v Leicestershire | The Brit Oval, Kennington | 2005 |
| 157 | 58* | Somerset v Worcestershire | County Ground, New Road, Worcester | 2009 |
| 157-9 | 47 | Somerset v Surrey | The Kia Oval, Kennington | 2019 |
| 156-8 | 62 | Somerset v Glamorgan | The SWALEC Stadium, Cardiff | 2008 |
| 156-4 | 46 | Somerset v Gloucestershire | County Ground, Bristol | 2010 |
| 156-8 | 55 | Somerset v Gloucestershire | County Ground, Bristol | 2014 |
| 155-6 | 58 | Somerset v Northamptonshire | County Ground, Northampton | 2005 |
| 155-4 | 64* | Somerset v Northamptonshire | County Ground, Taunton | 2013 |
| 155-4 | 60 | Somerset v Hampshire | The Ageas Bowl, Southampton | 2014 |
| 154-8 | 48 | Somerset v Warwickshire | Edgbaston, Birmingham | 2007 |
| 154-6 | 54 | Somerset v Glamorgan | The Cooper Associates County Ground, Taunton | 2023 |
| 154 | 34 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2023 |
| 153 | 53 | Somerset v Essex | The Cloudfm County Ground, Chelmsford | 2021 |
| 153-8 | 50 | Somerset v Hampshire | Edgbaston, Birmingham | 2021 |
| 153 | 34 | Somerset v Hampshire | Edgbaston, Birmingham | 2022 |
| 152-4 | 74 | Somerset v Middlesex | The Kia Oval, Kennington | 2014 |
| 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 | 50 | Somerset v Gloucestershire | County Ground, Bristol | 2004 |
| 151-9 | 40 | Somerset v Northamptonshire | County Ground, Northampton | 2006 |
| 151-9 | 31 | Somerset v Kent | Spitfire Ground, St Lawrence, Canterbury | 2015 |
| 151-6 | 59 | Somerset v Nottinghamshire | Trent Bridge, Nottingham | 2017 |
| 150-7 | 40 | Somerset v Essex | County Ground, Taunton | 2014 |
| 150 | 42 | Somerset v Essex | The Cooper Associates County Ground, Taunton | 2023 |
