| Inns | HS |
| 204-4 | 49 | Essex v Gloucestershire | The Ford County Ground, Chelmsford | 2011 |
| 201-6 | 40 | Essex v Kent | The Cloudfm County Ground, Chelmsford | 2018 |
| 198-7 | 49 | Essex v Surrey | The Cloud County Ground, Chelmsford | 2022 |
| 196-6 | 49* | Essex v Sussex | The Ford County Ground, Chelmsford | 2006 |
| 195-6 | 48 | Essex v Glamorgan | The Essex County Ground, Chelmsford | 2014 |
| 192-9 | 47 | Essex v Northamptonshire | The Ford County Ground, Chelmsford | 2008 |
| 190 | 47 | Essex v Sussex | The PROBIZ County Ground, Hove | 2012 |
| 188-6 | 47* | Essex v Kent | Spitfire Ground, St Lawrence, Canterbury | 2022 |
| 187-3 | 46* | Essex v Kent | The Cloud County Ground, Chelmsford | 2024 |
| 182-9 | 35 | Essex v Gloucestershire | College Ground, Cheltenham | 2016 |
| 181-7 | 45 | Essex v Middlesex | The Cloudfm County Ground, Chelmsford | 2018 |
| 180-8 | 39 | Essex v Kent | The Essex County Ground, Chelmsford | 2013 |
| 178-7 | 47 | Essex v Somerset | The Cooper Associates County Ground, Taunton | 2016 |
| 177-7 | 48* | Essex v Somerset | County Ground, Taunton | 2010 |
| 176-8 | 36 | Essex v Sussex | The Essex County Ground, Chelmsford | 2016 |
| 172-4 | 42* | Essex v Sussex | The Essex County Ground, Chelmsford | 2013 |
| 172-9 | 43 | Essex v Middlesex | The Cloudfm County Ground, Chelmsford | 2017 |
| 171-4 | 37 | Essex v Sussex | The Ford County Ground, Chelmsford | 2007 |
| 171 | 39 | Essex v Gloucestershire | Ambassador Cruise Line Ground, Chelmsford | 2025 |
| 170-8 | 38 | Essex v Middlesex | Lord's Cricket Ground, St John's Wood | 2013 |
| 170-8 | 49 | Essex v Hampshire | The Cloudfm County Ground, Chelmsford | 2018 |
| 169 | 46 | Essex v Kent | Spitfire Ground, St Lawrence, Canterbury | 2021 |
| 168-9 | 40 | Essex v Kent | The Ford County Ground, Chelmsford | 2011 |
| 168-5 | 38* | Essex v Northamptonshire | Edgbaston, Birmingham | 2013 |
| 168-8 | 48 | Essex v Glamorgan | The Cloud County Ground, Chelmsford | 2024 |
| 167-9 | 44 | Essex v Hampshire | The Essex County Ground, Chelmsford | 2014 |
| 167 | 43 | Essex v Glamorgan | The Cloudfm County Ground, Chelmsford | 2018 |
| 166-5 | 42 | Essex v Surrey | The Essex County Ground, Chelmsford | 2014 |
| 166-8 | 47 | Essex v Kent | The Kent County Cricket Ground, Beckenham | 2017 |
| 165-6 | 33 | Essex v Warwickshire | Edgbaston, Birmingham | 2015 |
| 165-4 | 45* | Essex v Lancashire | Emirates Riverside, Chester-le-Street | 2019 |
| 164-9 | 41 | Essex v Surrey | The Ford County Ground, Chelmsford | 2008 |
| 163 | 42 | Essex v Kent | Spitfire Ground, St Lawrence, Canterbury | 2018 |
| 163-7 | 42 | Essex v Kent | The Kia Oval, Kennington | 2020 |
| 162-6 | 42 | Essex v Middlesex | The Ford County Ground, Chelmsford | 2010 |
| 162 | 46 | Essex v Surrey | The Essex County Ground, Chelmsford | 2016 |
| 161 | 44 | Essex v Surrey | The Essex County Ground, Chelmsford | 2015 |
| 161-5 | 36 | Essex v Lancashire | Emirates Old Trafford, Manchester | 2022 |
| 160-9 | 37 | Essex v Middlesex | The Cloudfm County Ground, Chelmsford | 2021 |
| 160-6 | 30 | Essex v Middlesex | Lord's Cricket Ground, St John's Wood | 2025 |
| 159 | 49 | Essex v Hampshire | The Ford County Ground, Chelmsford | 2008 |
| 157-8 | 42 | Essex v Middlesex | The Essex County Ground, Chelmsford | 2014 |
| 156-8 | 32 | Essex v Middlesex | Lord's Cricket Ground, St John's Wood | 2020 |
| 156-9 | 41 | Essex v Middlesex | Ambassador Cruise Line Ground, Chelmsford | 2025 |
| 155-6 | 49 | Essex v Hampshire | The Rose Bowl, Southampton | 2003 |
| 155-6 | 38 | Essex v Middlesex | Lord's Cricket Ground, St John's Wood | 2012 |
| 155-5 | 44 | Essex v Surrey | The Kia Oval, Kennington | 2014 |
| 153-8 | 36 | Essex v Kent | St Lawrence Ground, Canterbury | 2011 |
| 153-8 | 45 | Essex v Gloucestershire | The Essex County Ground, Chelmsford | 2016 |
| 153-6 | 47 | Essex v Hampshire | The Ageas Bowl, Southampton | 2016 |
| 153-6 | 36 | Essex v Glamorgan | Sophia Gardens, Cardiff | 2021 |
| 151-7 | 39 | Essex v Sussex | The Ford County Ground, Chelmsford | 2011 |
