Most runs in a day by Glamorgan as a team in a County Championship match

499 – 2nd day v Essex at Sophia Gardens, Cardiff, 2002
493 – 4th day v Worcestershire at Abergavenny, 1990
481 – 1st day v Derbyshire at Colwyn Bay, 2016

452 – 3rd day v Leicestershire at Leicester (Grace Road), 2022
447 – 2nd day v Northamptonshire at Northampton, 2019
433 – 1st day v Durham at Sophia Gardens, Cardiff, 1997
433 – 1st day v Northamptonshire at Sophia Gardens, Cardiff, 2019
410 – 3rd day v Northamptonshire at Sophia Gardens, Cardiff, 2021
409 – 2nd day v Leicestershire at Swansea, 2013

Most runs in a day by an individual batter for Glamorgan in a County Championship match

258 – SA Northeast v Leicestershire at Leicester (Grace Road), 2022

238* – MP Maynard v Hampshire at Southampton, 1991
235* – SP James v Essex at Chelmsford, 2002
234 – AHT Donald v Derbyshire at Colwyn Bay, 2016
229 – WT Root v Northamptonshire at Northampton, 2019
218* – DE Davies v Gloucestershire at Rodney Parade, Newport, 1939