| 1891 Pittsburgh Pirates | ||
|---|---|---|
| League | National League | |
| Ballpark | Exposition Park | |
| City | Allegheny, Pennsylvania | |
| Owner | William A. Nimick | |
| Managers | Bill McGunnigle, Ned Hanlon | |
| ||
The 1891 Pittsburgh Pirates season was the tenth season of the Pittsburgh Pirates franchise and the first season under the "Pirates" name; their fifth place in the National League. The Pirates finished eighth and last in the National League with a record of 55–80.