Appearances
| Record career league appearances | Tony Brown, 574 (561 and 13 sub) |
| Record career appearances in all games | Tony Brown 720 (706 and 14 sub) |
| Most capped player while at Albion | Chris Brunt, 47 for Northern Ireland |
Transfers
| Record signing | Nacer Chadli, undisclosed fee from Tottenham Hotspur, August 2016 |
| Record transfer received | Saido Berahino, undisclosed fee to Stoke City, January 2017 |
Oldest Players
| NAME | AGE | OPPOSITION | DATE |
| Dean Kiely (GK) | 39 years and 189 days | v Middlesbrough | April 17, 2010 |
| Gareth Barry | 39 years and 8 days | v Newcastle United | March 03, 2020 |
| George Lee | 38 years and 326 days | v Luton Town | April 26, 1958 |
| Hubert Pearson (GK) | 38 years and 310 days | v West Ham United | March 21, 1925 |
| Jesse Pennington | 38 years and 256 days | v Liverpool | May 6, 1922 |
| Len Millard | 38 years and 226 days | v Leeds United | October, 1957 |
| Gareth McAuley | 38 years and 60 days | v Southampton | February 3, 2018 |
| Nigel Spink (GK) | 38 years and 30 days | v QPR | September 7, 1996 |
| George Shan | 37 years and 340 days | v Preston North End | September 18, 1937 |
| Jim Sanders (GK) | 37 years and 253 days | v Everton | March 12, 1958 |
Youngest Players
| NAME | AGE | OPPOSITION | COMPETITION | DATE |
| Charles Wilson | 16 years and 73 days | v Oldham | League | October, 1921 |
| Izzy Brown | 16 years and 117 days | v Wigan Athletic | League | May 4, 2013 |
| Jonathan Leko | 16 years and 152 days | v Norwich City | League Cup | September 23, 2015 |
| Kane Wilson | 16 years and 165 days | v Northampton | League Cup | August 23, 2016 |
| Morgan Rogers | 16 years and 195 days | v Brighton & Hove Albion | FA Cup | February 6, 2019 |
| Bobby Hope | 16 years and 215 days | v Arsenal | League | April 30, 1960 |
| Mickey Lewis | 16 years and 303 days | v Crystal Palace | League Cup | December 15, 1981 |
| George Thorne | 16 years and 328 days | v Sheffield Wednesday | League | November 28, 2009 |
| Ian Collard | 17 years and 26 days | v Burnley | League | September 26, 1964 |
| Alistair Robertson | 17 years and 46 days | v Manchester United | League | October 25, 1969 |
| Reg Cutler | 17 years and 55 days | v Derby County | League | April 12, 1952 |
| David Worrall | 17 years and 63 days | v Bournemouth | League Cup | August 14, 2007 |
| Geoff Carter | 17 years and 76 days | v Arsenal | League | April 30, 1960 |
| Len Cantello | 17 years and 87 days | v Ipswich Town | League | December 7, 1968 |
| Graham Lovett | 17 years and 122 days | v Chelsea | League | December 5, 1964 |
| Tyler Roberts | 17 years and 124 days | v Liverpool | League | May 15, 2016 |
| Chris Wood | 17 years and 125 days | v Portsmouth | League | April 11, 2009 |
| Mark Robinson | 17 years and 137 days | v Sheffield Wednesday | League |
Statistics of oldest and youngest players are correct for all competitive fixtures, excluding wartime games and friendlies.