For Glamorgan

392 (65.2 overs) SR Barwick v Somerset at Swansea, 1994
372 (62 overs) RDB Croft v Hampshire at Swansea, 1993
365 (60.5 overs) DA Cosker v Yorkshire at Scarborough, 2001
365 (60.5 overs)RDB Croft v Surrey at Sophia Gardens, Cardiff, 2001
354 (59 overs) RDB Croft v Durham at Sophia Gardens, Cardiff, 1999
348 (58 overs )RDB Croft v Essex at Chelmsford, 2004
346 (57.4 overs) DJ Shepherd v Derbyshire at Swansea, 1970
337 (56.1 overs) JE McConnon v Northamptonshire at Northampton, 1958
331 (55.1 overs) DJ Shepherd v Hampshire at Bournemouth, 1963
336 (56 overs) RDB Croft v Surrey at Sophia Gardens, Cardiff, 1996
330 (55 overs) DE Davies v Middlesex at Cardiff Arms Park, 1932
330 (55 overs) JS Pressdee v Northamptonshire at Northampton, 1965
330 (55 overs) RDB Croft v Leicestershire at Sophia Gardens, Cardiff, 2006
324 (54 overs) RDB Croft v Essex at Chelmsford, 2002
324 (54 overs) RDB Croft v Essex at Chelmsford, 2007
324 (54 overs) AG Salter v Sussex at Hove, 2022
320 (40 overs) DE Davies v Warwickshire at Edgbaston, 1939

Against Glamorgan

402 (67 overs)CW Henderson for Leicestershire at Colwyn Bay, 2009
378 (63 overs) PJ Sainsbury for Hampshire at Sophia Gardens, Cardiff, 1974
374 (62.2 overs) JF Brown for Northamptonshire at Sophia Gardens, Cardiff, 2003
376 (47 overs)AW Wellard for Somerset at Rodney Parade, Newport, 1939
366 (61 overs) J O’Connor for Essex at Swansea, 1928
366 (61 overs) AB Hipkin for Essex at Swansea, 1928
366 (61 overs) JW Lee for Somerset at Weston-super-Mare, 1929
360 (60 overs) G Miller for Derbyshire at Derby, 1982
360 (60 overs) MCJ Ball for Gloucestershire at Cheltenham College, 2006