| 350-6 | Middlesex v Lancashire | Lord's Cricket Ground, St John's Wood | 2012 | a22003 |
| 341-7 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 2009 | a19805 |
| 337-5 | Middlesex v Somerset | John Walker's Ground, Southgate | 2003 | a15204 |
| 333-4 | Middlesex v Gloucestershire | John Walker's Ground, Southgate | 2005 | a16741 |
| 325-5 | Middlesex v Leicestershire | Grace Road, Leicester | 1992 | a7526 |
| 322-5 | Middlesex v Kent | St Lawrence Ground, Canterbury | 2009 | a19784 |
| 315-6 | Middlesex v Surrey | The Brit Oval, Kennington | 2008 | a18947 |
| 314-5 | Middlesex v Nottinghamshire | John Walker's Ground, Southgate | 2005 | a16672 |
| 304-8 | Middlesex v Cornwall | Wheal Eliza, Bethel, St Austell | 1995 | a9295 |
| 304-7 | Middlesex v Surrey | The Foster's Oval, Kennington | 1995 | a9330 |
| 303-7 | Middlesex v Northamptonshire | County Ground, Northampton | 1977 | a1920 |
| 302-7 | Middlesex v Scotland | Lord's Cricket Ground, St John's Wood | 2009 | a19754 |
| 300-4 | Middlesex v Nottinghamshire | Lord's Cricket Ground, St John's Wood | 2003 | a15251 |
| 299-8 | Middlesex v Gloucestershire | College Ground, Cheltenham | 2010 | a20688 |
| 296-4 | Middlesex v Lancashire | Old Trafford, Manchester | 1990 | a6691 |
| 294-7 | Middlesex v Shropshire | St Georges Recreation Ground, Telford | 1992 | a7622 |
| 291-5 | Middlesex v Surrey | Uxbridge Cricket Club Ground, Uxbridge | 1990 | a6639 |
| 291-5 | Middlesex v Essex | County Ground, Chelmsford | 2002 | a14297 |
| 290-6 | Middlesex v Worcestershire | Lord's Cricket Ground, St John's Wood | 1990 | a6623 |
| 288-6 | Middlesex v Sussex | Arundel Castle Cricket Club Ground, Arundel | 1999 | a12034 |
| 288 | Middlesex v Essex | Lord's Cricket Ground, St John's Wood | 2012 | a22106 |
| 287-5 | Middlesex v Glamorgan | Lord's Cricket Ground, St John's Wood | 1990 | a6678 |
| 286-5 | Middlesex v Netherlands | Lord's Cricket Ground, St John's Wood | 2011 | a21333 |
| 284-8 | Middlesex v Northamptonshire | County Ground, Northampton | 2005 | a16659 |
| 284-9 | Middlesex v Glamorgan | Sophia Gardens, Cardiff | 2005 | a16749 |
| 284-5 | Middlesex v Kent | Lord's Cricket Ground, St John's Wood | 2006 | a17493 |
| 283-9 | Middlesex v Cumberland | Uxbridge Cricket Club Ground, Uxbridge | 1985 | a4493 |
| 283-5 | Middlesex v Sussex | Lord's Cricket Ground, St John's Wood | 1998 | a11123 |
| 282-6 | Middlesex v Somerset | County Ground, Taunton | 1980 | a2638 |
| 282-6 | Middlesex v Sussex | County Ground, Hove | 1990 | a6526 |
| 280-8 | Middlesex v Sussex | Lord's Cricket Ground, St John's Wood | 1965 | a54 |
| 280-5 | Middlesex v Sussex | County Ground, Hove | 1985 | a4409 |
| 280-6 | Middlesex v Gloucestershire | Uxbridge Cricket Club Ground, Uxbridge | 1997 | a10601 |
| 280-4 | Middlesex v Scotland | Raeburn Place, Edinburgh | 2009 | a19795 |
| 278-4 | Middlesex v Derbyshire | County Ground, Derby | 1996 | a9905 |
| 278-6 | Middlesex v Herefordshire | Mortimer Park, Kingsland | 2001 | a13562 |
| 278-4 | Middlesex v Lancashire | Old Trafford, Manchester | 2003 | a15254 |
| 278-4 | Middlesex v Hampshire | Lord's Cricket Ground, St John's Wood | 2003 | a15303 |
| 278-6 | Middlesex v Warwickshire | Lord's Cricket Ground, St John's Wood | 2009 | a19809 |
| 277-6 | Middlesex v Wales Minor Counties | Lamphey Cricket Club Ground, Lamphey | 2004 | a15873 |
| 277-7 | Middlesex v Essex | The Ford County Ground, Chelmsford | 2007 | a18223 |
| 276-8 | Middlesex v Lancashire | Lord's Cricket Ground, St John's Wood | 1984 | a4154 |
| 276-8 | Middlesex v Combined Universities | Lord's Cricket Ground, St John's Wood | 1995 | a9235 |
| 274-5 | Middlesex v Nottinghamshire | Lord's Cricket Ground, St John's Wood | 2000 | a12784 |
| 274-8 | Middlesex v Surrey | Whitgift School, Croydon | 2002 | a14437 |
| 273-6 | Middlesex v Surrey | Kennington Oval, Kennington | 1983 | a3620 |
| 273-6 | Middlesex v Yorkshire | John Walker's Ground, Southgate | 2004 | a16020 |
| 273-5 | Middlesex v Sussex | County Ground, Hove | 2008 | a18969 |
| 273-5 | Middlesex v Australians | Lord's Cricket Ground, St John's Wood | 2010 | a20612 |
| 272-9 | Middlesex v Surrey | Kennington Oval, Kennington | 1970 | a373 |
| 272-6 | Middlesex v Lancashire | Old Trafford, Manchester | 1990 | a6708 |
| 270-9 | Middlesex v Lancashire | Old Trafford, Manchester | 1976 | a1747 |
| 270-5 | Middlesex v Gloucestershire | Lord's Cricket Ground, St John's Wood | 1983 | a3741 |
| 270 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 1987 | a5242 |
| 270-8 | Middlesex v Cumberland | Edenside, Carlisle | 1996 | a9915 |
| 269 | Middlesex v Buckinghamshire | Lord's Cricket Ground, St John's Wood | 1965 | a40 |
| 269-4 | Middlesex v Northamptonshire | County Ground, Northampton | 1994 | a8777 |
| 267-4 | Middlesex v Buckinghamshire | Lord's Cricket Ground, St John's Wood | 1975 | a1448 |
| 267-7 | Middlesex v Hampshire | County Ground, Southampton | 1989 | a6184 |
| 266-3 | Middlesex v Sussex | Lord's Cricket Ground, St John's Wood | 1989 | a6164 |
| 266 | Middlesex v Hampshire | The Rose Bowl, Southampton | 2009 | a19822 |
| 264-5 | Middlesex v Norfolk | Lord's Cricket Ground, St John's Wood | 1970 | a294 |
| 263 | Middlesex v Glamorgan | Lord's Cricket Ground, St John's Wood | 1996 | a9837 |
| 263-4 | Middlesex v Lancashire | Old Trafford, Manchester | 2005 | a16842 |
| 263 | Middlesex v Kent | St Lawrence Ground, Canterbury | 2011 | a21467 |
| 262-3 | Middlesex v Northamptonshire | County Ground, Northampton | 1986 | a4904 |
| 262-8 | Middlesex v Glamorgan | Lord's Cricket Ground, St John's Wood | 2007 | a18195 |
| 262-8 | Middlesex v Sussex | Lord's Cricket Ground, St John's Wood | 2007 | a18265 |
| 261-2 | Middlesex v Warwickshire | Edgbaston, Birmingham | 1993 | a8142 |
| 261-4 | Middlesex v Surrey | The Foster's Oval, Kennington | 1994 | a8789 |
| 260 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 1997 | a10500 |
| 260-6 | Middlesex v Derbyshire | County Ground, Derby | 2003 | a15222 |
| 260-4 | Middlesex v Glamorgan | Lord's Cricket Ground, St John's Wood | 2004 | a15905 |
| 259-5 | Middlesex v Leicestershire | Grace Road, Leicester | 1990 | a6593 |
| 259-8 | Middlesex v Durham | Uxbridge Cricket Club Ground, Uxbridge | 1992 | a7644 |
| 259-6 | Middlesex v Northamptonshire | Uxbridge Cricket Club Ground, Uxbridge | 1994 | a8710 |
| 259-7 | Middlesex v Essex | The Ford County Ground, Chelmsford | 2008 | a18987 |
| 258-2 | Middlesex v Worcestershire | County Ground, New Road, Worcester | 1975 | a1510 |
| 258-4 | Middlesex v Minor Counties East | Lord's Cricket Ground, St John's Wood | 1976 | a1661 |
| 258 | Middlesex v Lancashire | Old Trafford, Manchester | 1978 | a2252 |
| 258-8 | Middlesex v Kent | St Lawrence Ground, Canterbury | 1986 | a4841 |
| 258-7 | Middlesex v Surrey | Kennington Oval, Kennington | 1988 | a5780 |
| 258-9 | Middlesex v Warwickshire | Lord's Cricket Ground, St John's Wood | 1997 | a10638 |
| 258-8 | Middlesex v Sussex | Lord's Cricket Ground, St John's Wood | 2003 | a15131 |
| 258-3 | Middlesex v Durham | Lord's Cricket Ground, St John's Wood | 2006 | a17528 |
| 257-5 | Middlesex v Nottinghamshire | Trent Bridge, Nottingham | 1992 | a7558 |
| 257-6 | Middlesex v Nottinghamshire | Lord's Cricket Ground, St John's Wood | 1993 | a8039 |
| 257-9 | Middlesex v Surrey | John Walker's Ground, Southgate | 2006 | a17473 |
| 256-9 | Middlesex v Worcestershire | County Ground, New Road, Worcester | 1976 | a1696 |
| 256-5 | Middlesex v Sussex | Lord's Cricket Ground, St John's Wood | 1986 | a4865 |
| 255-9 | Middlesex v Kent | John Walker's Ground, Southgate | 1991 | a7059 |
| 255-6 | Middlesex v Gloucestershire | Lord's Cricket Ground, St John's Wood | 1996 | a9829 |
| 255-9 | Middlesex v Scotland | Old Deer Park, Richmond | 2003 | a15166 |
| 255-6 | Middlesex v Lancashire | Lord's Cricket Ground, St John's Wood | 2003 | a15188 |
| 254-7 | Middlesex v Warwickshire | Lord's Cricket Ground, St John's Wood | 1979 | a2466 |
| 254 | Middlesex v Hampshire | Uxbridge Cricket Club Ground, Uxbridge | 2006 | a17417 |
| 254-3 | Middlesex v Glamorgan | The SWALEC Stadium, Cardiff | 2009 | a19888 |
| 254-9 | Middlesex v Glamorgan | Lord's Cricket Ground, St John's Wood | 2013 | a22600 |
| 253-6 | Middlesex v Glamorgan | Sophia Gardens, Cardiff | 1998 | a11164 |
| 253-6 | Middlesex v Worcestershire | Chester Road North, Kidderminster | 2008 | a19157 |
| 253 | Middlesex v Yorkshire | Lord's Cricket Ground, St John's Wood | 2011 | a21446 |
| 253-8 | Middlesex v Derbyshire | Queen's Park, Chesterfield | 2011 | a21472 |
| 252-5 | Middlesex v Surrey | Lord's Cricket Ground, St John's Wood | 1999 | a12102 |
| 252-9 | Middlesex v Somerset | County Ground, Taunton | 2013 | a22625 |
| 250-8 | Middlesex v Surrey | Kennington Oval, Kennington | 1965 | a58 |
| 250-4 | Middlesex v Somerset | Lord's Cricket Ground, St John's Wood | 2004 | a15913 |
