| 454-3 | Gloucestershire v Somerset | Seat Unique Stadium, Bristol | 2023 | a30135 |
| 429-9 | Nottinghamshire v Somerset | The Cooper Associates County Ground, Taunton | 2017 | a25664 |
| 415-8 | Northamptonshire v Somerset | County Ground, Northampton | 2023 | a30124 |
| 397-5 | Sussex v Somerset | The Cooper Associates County Ground, Taunton | 2022 | a29400 |
| 383-7 | Kent v Somerset | County Ground, Taunton | 2014 | a23446 |
| 364-6 | Middlesex v Somerset | Brunton Memorial Ground, Radlett | 2019 | a27350 |
| 357-3 | Warwickshire v Somerset | Edgbaston, Birmingham | 1995 | a9308 |
| 356-9 | Hampshire v Somerset | The Ageas Bowl, Southampton | 2018 | a26480 |
| 352-6 | Kent v Somerset | The Cooper Associates County Ground, Taunton | 2017 | a25516 |
| 343-9 | Yorkshire v Somerset | County Ground, Taunton | 2005 | a16791 |
| 342-5 | Australians v Somerset | County Ground, Taunton | 2005 | a16672 |
| 342 | Durham v Somerset | The Cooper Associates County Ground, Taunton | 2022 | a29355 |
| 341-7 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 2009 | a19813 |
| 341-7 | Sussex v Somerset | The Cooper Associates County Ground, Taunton | 2018 | a26421 |
| 339 | Kent v Somerset | County Ground, Taunton | 2002 | a14428 |
| 338-6 | Kent v Somerset | Mote Park, Maidstone | 1996 | a9806 |
| 337-5 | Middlesex v Somerset | John Walker's Ground, Southgate | 2003 | a15211 |
| 336-9 | Middlesex v Somerset | The Cooper Associates County Ground, Taunton | 2022 | a29377 |
| 335-6 | Hampshire v Somerset | County Ground, Taunton | 2003 | a15252 |
| 334-6 | Essex v Somerset | The Cooper Associates County Ground, Taunton | 2017 | a25581 |
| 331-3 | Durham v Somerset | County Ground, Taunton | 2015 | a24173 |
| 328-8 | Gloucestershire v Somerset | County Ground, Taunton | 2006 | a17415 |
| 327-6 | Leicestershire v Somerset | The Cooper Associates County Ground, Taunton | 2021 | a28516 |
| 324-4 | Leicestershire v Somerset | Grace Road, Leicester | 2013 | a22642 |
| 319-5 | Kent v Somerset | Recreation Ground, Bath | 2005 | a16669 |
| 319-6 | Sussex v Somerset | The Cooper Associates County Ground, Taunton | 2023 | a30131 |
| 317-9 | Derbyshire v Somerset | The Cooper Associates County Ground, Taunton | 2024 | a31039 |
| 313 | Essex v Somerset | The Cloudfm County Ground, Chelmsford | 2018 | a26435 |
| 311-7 | Durham v Somerset | County Ground, Taunton | 2014 | a23427 |
| 311-9 | Leicestershire v Somerset | The Cooper Associates County Ground, Taunton | 2024 | a31092 |
| 310-7 | Lancashire v Somerset | County Ground, Taunton | 2003 | a15288 |
| 307-4 | Yorkshire v Somerset | County Ground, Taunton | 2002 | a14290 |
| 305-6 | Northamptonshire v Somerset | County Ground, Northampton | 2021 | a28513 |
| 303-7 | Derbyshire v Somerset | County Ground, Taunton | 1990 | a6510 |
| 303-6 | Warwickshire v Somerset | Edgbaston, Birmingham | 1991 | a7006 |
| 302-8 | Sussex v Somerset | County Ground, Taunton | 1993 | a8119 |
| 302-9 | Surrey v Somerset | The Kia Oval, Kennington | 2022 | a29390 |
| 301-8 | Glamorgan v Somerset | The Cooper Associates County Ground, Taunton | 2023 | a30163 |
| 299-5 | Hampshire v Somerset | County Ground, Taunton | 1985 | a4544 |
| 299-6 | Northamptonshire v Somerset | County Ground, Taunton | 2002 | a14265 |
| 298-8 | Sussex v Somerset | County Ground, Taunton | 2005 | a16654 |
| 298-6 | Worcestershire v Somerset | County Ground, Taunton | 2008 | a19141 |
| 298 | Derbyshire v Somerset | The Cooper Associates County Ground, Taunton | 2021 | a28468 |
| 296-6 | Surrey v Somerset | The Foster's Oval, Kennington | 1998 | a11168 |
| 296-7 | Nottinghamshire v Somerset | County Ground, Taunton | 2002 | a14474 |
| 296-4 | Scotland v Somerset | County Ground, Taunton | 2003 | a15170 |
| 296-9 | Middlesex v Somerset | The Cooper Associates County Ground, Taunton | 2016 | a24839 |
| 295-6 | Surrey v Somerset | The Kia Oval, Kennington | 2012 | a21959 |
| 294-7 | Gloucestershire v Somerset | County Ground, Taunton | 1982 | a3319 |
| 294-6 | Gloucestershire v Somerset | County Ground, Bristol | 2008 | a18984 |
| 293-6 | Kent v Somerset | County Ground, Taunton | 1985 | a4408 |
| 293-5 | Essex v Somerset | County Ground, Taunton | 1989 | a6090 |
| 292-5 | Warwickshire v Somerset | County Ground, Taunton | 1978 | a2215 |
| 291-8 | Sussex v Somerset | County Ground, Taunton | 2010 | a20579 |
| 290-8 | Surrey v Somerset | The Cooper Associates County Ground, Taunton | 2017 | a25488 |
| 289-6 | Glamorgan v Somerset | County Ground, Taunton | 2014 | a23483 |
| 289 | Glamorgan v Somerset | The Cooper Associates County Ground, Taunton | 2018 | a26416 |
| 289-9 | Surrey v Somerset | The Cooper Associates County Ground, Taunton | 2019 | a27374 |
| 289-7 | Warwickshire v Somerset | Edgbaston, Birmingham | 2021 | a28526 |
| 288-5 | Hampshire v Somerset | Clarence Park, Weston-super-Mare | 1975 | a1498 |
| 288-3 | Surrey v Somerset | The Foster's Oval, Kennington | 1994 | a8609 |
| 288-4 | Sussex v Somerset | County Ground, Taunton | 2009 | a19832 |
| 287 | Essex v Somerset | County Ground, Taunton | 1978 | a2270 |
| 287-5 | Sussex v Somerset | County Ground, Taunton | 2007 | a18206 |
| 286-5 | Sussex v Somerset | County Ground, Taunton | 2003 | a15198 |
| 286-8 | Glamorgan v Somerset | County Ground, Taunton | 2007 | a18193 |
| 286-4 | Hampshire v Somerset | The Rose Bowl, Southampton | 2008 | a18965 |
| 285-9 | Zimbabweans v Somerset | County Ground, Taunton | 2003 | a15174 |
| 284-3 | Worcestershire v Somerset | County Ground, Taunton | 1990 | a6643 |
| 284-9 | Yorkshire v Somerset | County Ground, Taunton | 2004 | a15885 |
| 284-3 | Yorkshire v Somerset | County Ground, Taunton | 2006 | a17565 |
| 284-9 | Surrey v Somerset | The Kia Oval, Kennington | 2014 | a23502 |
| 284-4 | Warwickshire v Somerset | Edgbaston, Birmingham | 2016 | a24888 |
| 283-9 | Yorkshire v Somerset | North Marine Road, Scarborough | 2002 | a14409 |
| 282-6 | Middlesex v Somerset | County Ground, Taunton | 1980 | a2638 |
| 282-5 | Warwickshire v Somerset | Edgbaston, Birmingham | 1984 | a4066 |
| 281-3 | Derbyshire v Somerset | County Ground, Derby | 1993 | a8178 |
| 281-6 | Surrey v Somerset | County Ground, Taunton | 2003 | a15139 |
| 281 | Sri Lankans v Somerset | County Ground, Taunton | 2006 | a17483 |
| 280-6 | Kent v Somerset | St Lawrence Ground, Canterbury | 1995 | a9196 |
| 279-5 | Sussex v Somerset | County Ground, Taunton | 1984 | a4013 |
| 279-6 | Nottinghamshire v Somerset | Trent Bridge, Nottingham | 1993 | a8034 |
| 279-5 | Nottinghamshire v Somerset | Trent Bridge, Nottingham | 2003 | a15297 |
| 279 | Glamorgan v Somerset | The Cooper Associates County Ground, Taunton | 2016 | a24833 |
| 278-5 | Essex v Somerset | County Ground, Chelmsford | 1981 | a2936 |
| 278-4 | Durham v Somerset | County Ground, Taunton | 2004 | a15958 |
| 278-5 | Warwickshire v Somerset | County Ground, Taunton | 2005 | a16835 |
| 278-3 | Derbyshire v Somerset | County Ground, Derby | 2006 | a17599 |
| 277-5 | Derbyshire v Somerset | County Ground, Derby | 2005 | a16774 |
| 276 | Derbyshire v Somerset | County Ground, Derby | 2004 | a15870 |
| 275-5 | Kent v Somerset | County Ground, Taunton | 1984 | a4157 |
| 274-9 | Sussex v Somerset | County Ground, Taunton | 2004 | a16030 |
| 271 | British Universities v Somerset | County Ground, Taunton | 1996 | a9838 |
| 271-6 | Suffolk v Somerset | County Ground, Taunton | 1996 | a9924 |
| 271 | Worcestershire v Somerset | County Ground, Taunton | 2002 | a14412 |
| 271-9 | Warwickshire v Somerset | Edgbaston, Birmingham | 2009 | a19755 |
| 270-8 | Leicestershire v Somerset | Grace Road, Leicester | 1974 | a1198 |
| 270 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 1987 | a5244 |
| 270-5 | Warwickshire v Somerset | Clarence Park, Weston-super-Mare | 1990 | a6688 |
| 270-2 | Essex v Somerset | County Ground, Chelmsford | 1997 | a10487 |
| 270-7 | Gloucestershire v Somerset | The Royal and Sun Alliance County Ground, Bristol | 2002 | a14272 |
| 270-2 | Worcestershire v Somerset | County Ground, Taunton | 2002 | a14397 |
| 269-6 | Glamorgan v Somerset | County Ground, Taunton | 2001 | a13598 |
| 269 | Leicestershire v Somerset | Uptonsteel County Ground, Leicester | 2022 | a29364 |
| 268-2 | Lancashire v Somerset | County Ground, Taunton | 1995 | a9357 |
| 268-6 | Worcestershire v Somerset | County Ground, Taunton | 2006 | a17584 |
| 268 | Durham v Somerset | Riverside Ground, Chester-le-Street | 2008 | a19078 |
| 267-6 | Leicestershire v Somerset | County Ground, Taunton | 2000 | a12923 |
| 267 | Surrey v Somerset | County Ground, Taunton | 2015 | a24225 |
| 267 | Kent v Somerset | The Cooper Associates County Ground, Taunton | 2024 | a30986 |
| 266-3 | Sussex v Somerset | County Ground, Hove | 2005 | a16770 |
| 265 | Nottinghamshire v Somerset | County Ground, Taunton | 2003 | a15116 |
| 264-3 | Derbyshire v Somerset | County Ground, Taunton | 1990 | a6560 |
| 264-5 | Kent v Somerset | County Ground, Taunton | 1999 | a12058 |
| 264 | Pakistanis v Somerset | County Ground, Taunton | 2010 | a20752 |
| 263-4 | Durham v Somerset | County Ground, Taunton | 1992 | a7655 |
| 263-7 | Northamptonshire v Somerset | Wardown Park, Luton | 1993 | a8112 |
| 263 | Sussex v Somerset | County Ground, Hove | 1996 | a9957 |
| 263-6 | Warwickshire v Somerset | Edgbaston, Birmingham | 2002 | a14248 |
| 263-7 | Leicestershire v Somerset | Recreation Ground, Bath | 2004 | a15936 |
| 263-8 | Gloucestershire v Somerset | County Ground, Taunton | 2013 | a22756 |
| 263 | Worcestershire v Somerset | The Cooper Associates County Ground, Taunton | 2024 | a31067 |
| 262-6 | Leicestershire v Somerset | Agricultural Showgrounds, Frome | 1970 | a362 |
| 262-4 | Worcestershire v Somerset | County Ground, New Road, Worcester | 1997 | a10548 |
| 262-9 | Leicestershire v Somerset | County Ground, Taunton | 2001 | a13649 |
| 262-5 | Hampshire v Somerset | County Ground, Taunton | 2002 | a14361 |
| 261-5 | Kent v Somerset | Devonshire Park Ground, Weston-super-Mare | 1970 | a411 |
| 261-5 | Warwickshire v Somerset | County Ground, Taunton | 1982 | a3421 |
| 261-3 | Yorkshire v Somerset | County Ground, Taunton | 1997 | a10534 |
| 261-5 | Yorkshire v Somerset | North Marine Road, Scarborough | 2007 | a18313 |
| 261-8 | Yorkshire v Somerset | County Ground, Taunton | 2013 | a22779 |
| 261-8 | Nottinghamshire v Somerset | Trent Bridge, Nottingham | 2014 | a23435 |
| 261 | Derbyshire v Somerset | The Incora County Ground, Derby | 2023 | a30168 |
| 260 | Glamorgan v Somerset | Sophia Gardens, Cardiff | 1978 | a2237 |
| 260-7 | Warwickshire v Somerset | Edgbaston, Birmingham | 1995 | a9258 |
| 260 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 1997 | a10506 |
| 260-3 | Sussex v Somerset | County Ground, Taunton | 1999 | a12092 |
| 260-4 | Yorkshire v Somerset | Lord's Cricket Ground, St John's Wood | 2002 | a14514 |
| 260 | Gloucestershire v Somerset | The Cooper Associates County Ground, Taunton | 2016 | a24745 |
| 259-7 | Nottinghamshire v Somerset | County Ground, Taunton | 2004 | a16127 |
| 259-7 | Gloucestershire v Somerset | County Ground, Bristol | 2007 | a18232 |
| 259-5 | Kent v Somerset | The Kent County Cricket Ground, Beckenham | 2008 | a19030 |
| 259 | Glamorgan v Somerset | Sophia Gardens, Cardiff | 2019 | a27296 |
| 258-7 | Gloucestershire v Somerset | Ashley Down Ground, Bristol | 1973 | a870 |
| 258-7 | Surrey v Somerset | The Foster's Oval, Kennington | 1989 | a6133 |
| 258 | Durham v Somerset | County Ground, Taunton | 2007 | a18346 |
| 257-4 | Nottinghamshire v Somerset | Trent Bridge, Nottingham | 1995 | a9315 |
| 256-5 | Yorkshire v Somerset | Acklam Park, Middlesbrough | 1992 | a7593 |
| 256-9 | Nottinghamshire v Somerset | Trent Bridge, Nottingham | 1998 | a11286 |
| 255-5 | Lancashire v Somerset | Old Trafford, Manchester | 1970 | a376 |
| 255 | Gloucestershire v Somerset | Imperial Athletic Ground, Bristol | 1975 | a1369 |
| 255-4 | Yorkshire v Somerset | North Marine Road, Scarborough | 2004 | a16017 |
| 255-9 | Worcestershire v Somerset | County Ground, New Road, Worcester | 2010 | a20746 |
| 255-7 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 2014 | a23464 |
| 254-8 | Hampshire v Somerset | County Ground, Taunton | 1974 | a1139 |
| 254-7 | Surrey v Somerset | County Ground, Taunton | 1974 | a1255 |
| 254-7 | Worcestershire v Somerset | County Ground, New Road, Worcester | 2002 | a14299 |
| 253-4 | Essex v Somerset | County Ground, Chelmsford | 1986 | a4937 |
| 253-2 | Essex v Somerset | County Ground, Taunton | 1996 | a9859 |
| 253 | Surrey v Somerset | The Brit Oval, Kennington | 2006 | a17428 |
| 253-9 | Surrey v Somerset | The Brit Oval, Kennington | 2007 | a18384 |
| 252-7 | Gloucestershire v Somerset | County Ground, Taunton | 1972 | a710 |
| 252-8 | Warwickshire v Somerset | County Ground, Taunton | 1993 | a8174 |
| 252-7 | Nottinghamshire v Somerset | County Ground, Taunton | 2001 | a13593 |
| 252-9 | Scotland v Somerset | County Ground, Taunton | 2009 | a19793 |
| 252-9 | Middlesex v Somerset | County Ground, Taunton | 2013 | a22633 |
| 252 | Warwickshire v Somerset | Edgbaston, Birmingham | 2022 | a29419 |
| 251-9 | Gloucestershire v Somerset | Ashley Down Ground, Bristol | 1974 | a1149 |
| 251-8 | Northamptonshire v Somerset | County Ground, Northampton | 2000 | a12779 |
| 251-9 | Kent v Somerset | St Lawrence Ground, Canterbury | 2009 | a19810 |
| 251 | Worcestershire v Somerset | The Cooper Associates County Ground, Taunton | 2023 | a30118 |
| 250-9 | Kent v Somerset | St Lawrence Ground, Canterbury | 1995 | a9277 |
| 250-4 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 2004 | a15920 |
| 250-9 | Glamorgan v Somerset | County Ground, Taunton | 2012 | a22067 |
| 250-6 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 2013 | a22667 |
| 250-6 | Hampshire v Somerset | The Cooper Associates County Ground, Taunton | 2017 | a25564 |