| 1981 BALLPARK FACTORS | |||
| TEAM | PARK | Left-Hand Factors 1B/2B/3B/HR | Right-Hand Factors 1B/2B/3B/HR |
| Angels | Astrodome | 93/84/113/53 | 98/85/165/42 |
| Badgers | Anaheim Stadium | 102/107/40/124 | 103/105/54/101 |
| Beavers | Wrigley Field | 98/101/90/135 | 97/108/121/114 |
| Blues | Busch Stadium | 98/111/173/77 | 100/93/181/93 |
| Corsairs | Kingdome | 95/112/75/128 | 93/97/65/151 |
| Dust Bunnies | Comiskey Park | 103/79/134/71 | 101/91/107/95 |
| Gamblers | Riverfront Stadium | 101/123/152/91 | 96/119/115/94 |
| Gold Sox | Veterans Stadium | 95/105/157/126 | 96/116/103/113 |
| Hard Cider | Yankee Stadium | 102/92/104/142 | 103/88/143/52 |
| Iron | County Stadium | 98/92/103/79 | 101/83/102/70 |
| Knights | Tiger Stadium | 97/73/128/116 | 91/93/83/143 |
| Legends | Shea Stadium | 96/90/58/108 | 105/100/69/108 |
| Lumberjacks | Royals Stadium | 108/97/154/59 | 96/114/154/75 |
| Skipjacks | Memorial Stadium | 98/85/45/112 | 95/90/60/110 |
| Spikes | San Diego Stadium | 103/96/78/72 | 97/93/67/105 |
| Thunder | Oakland Coliseum | 96/82/61/77 | 105/67/60/103 |
| BALLPARK FACTORS FOR NON-OWNED PARKS | |||
| Atlanta | Fulton County Stadium | 106/112/91/134 | 98/76/67/176 |
| Boston | Fenway Park | 101/143/130/84 | 103/139/90/111 |
| Cleveland | Municipal Stadium | 98/92/68/81 | 107/98/69/116 |
| Los Angeles | Dodger Stadium | 110/76/45/88 | 106/76/63/97 |
| Minneapolis | Metropolitan Stadium | 104/114/129/121 | 105/107/148/97 |
| Montreal | Olympic Stadium | 104/105/80/94 | 93/127/83/75 |
| Pittsburgh | Three Rivers Stadium | 94/97/113/116 | 105/106/94/115 |
| San Francisco | Candlestick Park | 102/100/50/106 | 109/101/72/68 |
| Texas | Arlington Stadium | 102/95/52/71 | 102/101/74/60 |
| Toronto | Exhibition Stadium | 96/137/177/135 | 95/127/191/116 |