Oella Historic District | |
 Long Brick Row in the center of Oella, Maryland | |
   | |
| Location | Oella Ave., Glen Rd., Hollow Rd., Oella, Maryland |
|---|---|
| Coordinates | 39°16′32″N 76°47′14″W / 39.27556°N 76.78722°W |
| Area | 130 acres (53 ha) |
| Built | 1812 |
| NRHP reference No. | 76000979[1] |
| Added to NRHP | November 7, 1976 |
Oella is a mill town on the Patapsco River in western Baltimore County, Maryland, United States, located between Catonsville and Ellicott City. It is a 19th-century village of millworkers' homes.