===
First-class===
Team records • Highest total for – 676–5 declared v. Sussex, Hove, 2021 • Highest total against – 850–7 declared by Somerset, Taunton, 2007 • Lowest total for – 20 v. MCC, Lord's, 1864 • Lowest total against – 31 by Gloucestershire, Bristol, 1924
Batting records • Highest score – 331 J. D. B. Robertson v. Worcestershire, Worcester, 1949 • Highest score against – 341 C. M. Spearman for Gloucestershire, Gloucester, 2004 • Most runs in season – 2,669 E. H. Hendren, 1923
Most runs for Middlesex Qualification – 20,000 runs
Bowling records • Best bowling – 10–40 G. O. B. Allen v. Lancashire, Lord's, 1929 • Best bowling against – 9–38 R. C. Robertson-Glasgow for Somerset, Lord's, 1924 • Best match bowling • 16–114 G. Burton v. Yorkshire, Bramall Lane, Sheffield, 1888 • 16–114 J. T. Hearne v. Lancashire, Old Trafford, Manchester, 1898 • Best match bowling against – 16–100 J. E. B. B. P. Q. C. Dwyer for Sussex, Hove, 1906 • Wickets in season – 158 F. J. Titmus, 1955
Most wickets for Middlesex Qualification – 1,000 wickets
Wicket-keeping records Most dismissals for Middlesex Qualification – 500 dismissals
Best partnership for each wicket • – Indicates that the partnership was unbroken ===
List A===
Team records • Highest total for – 390–5 (50 overs) v. Durham, Chester-le-Street, 2025 • Highest total against – 404–4 (50 overs) by Sussex, Hove, 2022 • Lowest total for – 23 (19.4 overs) v. Yorkshire, Leeds, 1974 • Lowest total against – 41 (32 overs) by Northamptonshire, Northampton, 1975
Batting records • Highest score – 182, S.S. Eskinazi, Radlett, 2022 • Highest score against – 189* T. P. Alsop for Sussex, Hove, 2022
Bowling records • Best bowling for – 7–12 W. W. Daniel v. Minor Counties East, Ipswich, 1978 • Best bowling against – 6–27 J. C. Tredwell for Kent, Southgate, 2009
Best partnership for each wicket • 1st – 221*
Paul Stirling &
Dawid Malan v. Leicestershire, Leicester, 2013 • 2nd – 268
Dawid Malan &
Nick Gubbins v. Sussex, Hove, 2015 • 3rd – 277
Nick Compton &
Eoin Morgan v. Kent, Canterbury, 2009 • 4th – 220
Ed Joyce &
Jamie Dalrymple v. Glamorgan, Lord's, 2004 • 5th – 184*
Stephen Eskinazi &
Nick Gubbins v. Gloucestershire, Lord's, 2019 • 6th – 197
James Harris &
John Simpson v. Lancashire, Lord's, 2019 • 7th – 132
Keith Brown &
Neil Williams v. Somerset, Lord's, 1988 • 8th – 80
Ben Hutton &
Chad Keegan v. Durham, Chester-le-Street, 2003 • 9th – 84*
Neil Dexter &
Steven Finn v. Glamorgan, Cardiff, 2014 • 10th – 57*
Eoin Morgan &
Mohammad Ali v. Somerset, Bath, 2006 • Denotes not out/unbroken partnership ==Club captains==