| 353-8 | Hampshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2005 | a16619 |
| 335-6 | Gloucestershire v Middlesex | John Walker's Ground, Southgate | 2005 | a16741 |
| 335-4 | West Indies v Middlesex | Lord's Cricket Ground, St John's Wood | 2012 | a22007 |
| 332-5 | Somerset v Middlesex | Lord's Cricket Ground, St John's Wood | 2007 | a18243 |
| 322-4 | Somerset v Middlesex | Lord's Cricket Ground, St John's Wood | 1996 | a9801 |
| 310-4 | Hampshire v Middlesex | The Rose Bowl, Southampton | 2009 | a19822 |
| 307-4 | Surrey v Middlesex | The Foster's Oval, Kennington | 1992 | a7508 |
| 305-9 | Somerset v Middlesex | John Walker's Ground, Southgate | 2003 | a15204 |
| 303-5 | Kent v Middlesex | St Lawrence Ground, Canterbury | 1996 | a9901 |
| 302-7 | Gloucestershire v Middlesex | College Ground, Cheltenham | 2010 | a20688 |
| 301-7 | Leicestershire v Middlesex | Grace Road, Leicester | 1994 | a8669 |
| 301-7 | Bangladeshis v Middlesex | Lord's Cricket Ground, St John's Wood | 2010 | a20642 |
| 299-5 | Lancashire v Middlesex | Old Trafford, Manchester | 1990 | a6691 |
| 297-5 | Sussex v Middlesex | Arundel Castle Cricket Club Ground, Arundel | 1999 | a12034 |
| 295-5 | Hampshire v Middlesex | Lord's Cricket Ground, St John's Wood | 1998 | a11306 |
| 295-5 | Essex v Middlesex | County Ground, Chelmsford | 2002 | a14297 |
| 294-6 | Nottinghamshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2004 | a15928 |
| 294-6 | Hampshire v Middlesex | The Rose Bowl, Southampton | 2007 | a18181 |
| 293-5 | Somerset v Middlesex | Lord's Cricket Ground, St John's Wood | 2009 | a19805 |
| 288-6 | Sussex v Middlesex | County Ground, Hove | 1969 | a268 |
| 288-8 | Surrey v Middlesex | Uxbridge Cricket Club Ground, Uxbridge | 1990 | a6639 |
| 287-8 | Glamorgan v Middlesex | Sophia Gardens, Cardiff | 1993 | a8112 |
| 287-6 | Somerset v Middlesex | Lord's Cricket Ground, St John's Wood | 1997 | a10500 |
| 286-6 | Warwickshire v Middlesex | Lord's Cricket Ground, St John's Wood | 1997 | a10638 |
| 286-7 | Northamptonshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2002 | a14445 |
| 285-6 | Netherlands v Middlesex | Lord's Cricket Ground, St John's Wood | 2011 | a21333 |
| 283-8 | Somerset v Middlesex | County Ground, Taunton | 2003 | a15233 |
| 283-1 | Northamptonshire v Middlesex | County Ground, Northampton | 2005 | a16659 |
| 283 | Nottinghamshire v Middlesex | John Walker's Ground, Southgate | 2005 | a16672 |
| 282-6 | Sussex v Middlesex | County Ground, Hove | 1990 | a6526 |
| 282-7 | Kent v Middlesex | St Lawrence Ground, Canterbury | 1993 | a8093 |
| 281-8 | Somerset v Middlesex | County Ground, Taunton | 1980 | a2638 |
| 281-4 | Ireland v Middlesex | Castle Avenue, Dublin | 1997 | a10442 |
| 281-3 | Lancashire v Middlesex | Old Trafford, Manchester | 2003 | a15254 |
| 280-5 | Surrey v Middlesex | Kennington Oval, Kennington | 1970 | a373 |
| 280-3 | Glamorgan v Middlesex | Lord's Cricket Ground, St John's Wood | 2013 | a22600 |
| 279-6 | Lancashire v Middlesex | Old Trafford, Manchester | 1978 | a2252 |
| 279 | Nottinghamshire v Middlesex | Uxbridge Cricket Club Ground, Uxbridge | 1987 | a5326 |
| 279-7 | Herefordshire v Middlesex | Mortimer Park, Kingsland | 2001 | a13562 |
| 278-1 | Essex v Middlesex | The Ford County Ground, Chelmsford | 2007 | a18223 |
| 277-9 | Gloucestershire v Middlesex | Uxbridge Cricket Club Ground, Uxbridge | 1997 | a10601 |
| 277 | Sussex v Middlesex | Lord's Cricket Ground, St John's Wood | 1998 | a11123 |
| 277-7 | Hampshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2003 | a15303 |
| 277-5 | Australians v Middlesex | Lord's Cricket Ground, St John's Wood | 2010 | a20612 |
| 276-6 | Kent v Middlesex | John Walker's Ground, Southgate | 1991 | a7059 |
| 276-7 | Warwickshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2009 | a19809 |
| 275-5 | Kent v Middlesex | Lord's Cricket Ground, St John's Wood | 2006 | a17493 |
| 275-3 | Sussex v Middlesex | County Ground, Hove | 2008 | a18969 |
| 275-4 | Yorkshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2011 | a21446 |
| 272-4 | Gloucestershire v Middlesex | Lord's Cricket Ground, St John's Wood | 1983 | a3741 |
| 272-4 | Glamorgan v Middlesex | Sophia Gardens, Cardiff | 2001 | a13716 |
| 272-7 | Gloucestershire v Middlesex | John Walker's Ground, Southgate | 2002 | a14399 |
| 271-7 | Lancashire v Middlesex | Old Trafford, Manchester | 1976 | a1747 |
| 271-7 | Yorkshire v Middlesex | North Marine Road, Scarborough | 1990 | a6703 |
| 271-9 | Sussex v Middlesex | Lord's Cricket Ground, St John's Wood | 2007 | a18265 |
| 270-6 | Derbyshire v Middlesex | County Ground, Derby | 1996 | a9905 |
| 268-4 | Surrey v Middlesex | The Foster's Oval, Kennington | 1992 | a7721 |
| 265-4 | Glamorgan v Middlesex | Lord's Cricket Ground, St John's Wood | 1996 | a9837 |
| 264-7 | Hampshire v Middlesex | County Ground, Southampton | 1989 | a6184 |
| 264-5 | Northamptonshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2010 | a20684 |
| 264-8 | Kent v Middlesex | St Lawrence Ground, Canterbury | 2011 | a21467 |
| 263 | Nottinghamshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2003 | a15251 |
| 262-3 | Northamptonshire v Middlesex | Uxbridge Cricket Club Ground, Uxbridge | 1994 | a8710 |
| 262-3 | Surrey v Middlesex | The Foster's Oval, Kennington | 1994 | a8789 |
| 261-7 | Worcestershire v Middlesex | Lord's Cricket Ground, St John's Wood | 2004 | a16042 |
| 261-6 | Northamptonshire v Middlesex | Lord's Cricket Ground, St John's Wood | 2005 | a16784 |
| 260-4 | Durham v Middlesex | Uxbridge Cricket Club Ground, Uxbridge | 1992 | a7644 |
| 260-2 | Essex v Middlesex | The Ford County Ground, Chelmsford | 2008 | a18987 |
| 259 | Worcestershire v Middlesex | Lord's Cricket Ground, St John's Wood | 1974 | a1157 |
| 259 | Northamptonshire v Middlesex | County Ground, Northampton | 1986 | a4904 |
| 259-8 | Derbyshire v Middlesex | County Ground, Derby | 2003 | a15222 |
| 259-4 | Leicestershire v Middlesex | Lord's Cricket Ground, St John's Wood | 2007 | a18306 |
| 258-4 | Kent v Middlesex | St Lawrence Ground, Canterbury | 2009 | a19874 |
| 257 | Worcestershire v Middlesex | County Ground, New Road, Worcester | 1975 | a1510 |
| 257-4 | Worcestershire v Middlesex | County Ground, New Road, Worcester | 1991 | a7181 |
| 257-5 | Lancashire v Middlesex | Lord's Cricket Ground, St John's Wood | 2003 | a15188 |
| 257-9 | Yorkshire v Middlesex | John Walker's Ground, Southgate | 2004 | a16020 |
| 257-4 | Somerset v Middlesex | County Ground, Taunton | 2013 | a22625 |
| 256-8 | Nottinghamshire v Middlesex | Trent Bridge, Nottingham | 1992 | a7558 |
| 256 | Essex v Middlesex | County Ground, Chelmsford | 1997 | a10473 |
| 256-8 | Glamorgan v Middlesex | Lord's Cricket Ground, St John's Wood | 2004 | a15905 |
| 256-9 | Glamorgan v Middlesex | Lord's Cricket Ground, St John's Wood | 2007 | a18195 |
| 255-5 | Essex v Middlesex | Lord's Cricket Ground, St John's Wood | 1980 | a2765 |
| 255-9 | Somerset v Middlesex | Lord's Cricket Ground, St John's Wood | 1987 | a5242 |
| 253-8 | Derbyshire v Middlesex | County Ground, Derby | 1993 | a8028 |
| 253-8 | Warwickshire v Middlesex | Edgbaston, Birmingham | 1993 | a8142 |
| 252-5 | Surrey v Middlesex | Kennington Oval, Kennington | 1965 | a58 |
| 252-9 | Somerset v Middlesex | County Ground, Taunton | 1991 | a7118 |
| 252-8 | Nottinghamshire v Middlesex | Lord's Cricket Ground, St John's Wood | 1993 | a8039 |
| 252-7 | Glamorgan v Middlesex | Sophia Gardens, Cardiff | 1997 | a10462 |
| 252-9 | Surrey v Middlesex | Lord's Cricket Ground, St John's Wood | 1999 | a12102 |
| 252-6 | Sussex v Middlesex | Lord's Cricket Ground, St John's Wood | 2002 | a14267 |
| 252-7 | Lancashire v Middlesex | Old Trafford, Manchester | 2003 | a15153 |
| 252-4 | Worcestershire v Middlesex | County Ground, New Road, Worcester | 2004 | a16003 |
| 251-5 | Derbyshire v Middlesex | County Ground, Derby | 1990 | a6539 |
| 251-4 | Nottinghamshire v Middlesex | Lord's Cricket Ground, St John's Wood | 1990 | a6549 |
| 250-9 | Durham v Middlesex | Lord's Cricket Ground, St John's Wood | 1994 | a8693 |
| 250-9 | Kent v Middlesex | St Lawrence Ground, Canterbury | 1995 | a9259 |
| 250-6 | Yorkshire v Middlesex | North Marine Road, Scarborough | 2010 | a20717 |
