Officers were called to a report of a woman stabbed in a leg and the chest at Culliton Park near South Water and West Strawberry streets around 9:20 p.m.
The woman was transported to an area hospital.
She is expected to survive as her injuries were minor and not life-threatening.
Witnesses told police the woman was attacked by another woman.
Police continue to attempt to identify the suspect.
Anyone with information about this incident should contact police.
Click here to follow Daily Voice Lancaster and receive free news updates.