|Coordinates: 39°53′38″N 75°26′52″W / 39.89389°N 75.44778°WCoordinates: 39°53′38″N 75°26′52″W / 39.89389°N 75.44778°W|
|Elevation||151 ft (46 m)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|Area code(s)||610 and 484|
|GNIS feature ID||1179198|
Lenni is an unincorporated community in Middletown Township in Delaware County, Pennsylvania, United States. Lenni is located at the intersection of Lenni Road and Lungren Road northeast of the Chester Creek.