The shoulder patch of the Oakdale, Pennsylvania, Police Department.

The patch of the Oakdale Borough, Pennsylvania, Police Department combines the seals of the Commonwealth of Pennsylvania and Allegheny County with symbols of the community’s history. Featured are the oil derrick and locomotive, depicting local farms; an oak leaf and acorns, representing the many oak trees that surround the town and serve as its namesake; and the year of the borough’s founding—1892.