Mercer Park, located in Bayonne, NJ, is a Hudson County park. There is a playground, baseball field, basketball court, and picnic area. Some more details from their site:
Established in 1909, Mercer Park is a hidden gem of public space located in Bayonne along the border of Jersey City. Its 6 1/2 acres offer walkways to stroll through the greenery and shady resting spots amongst its massive trees. The park serves athletics with two recently refurbished basketball courts and a lighted field for the dual use of youth baseball and football. Mercer Park has a children's playground for enjoyment.

Directions

From their site:

Car
Mercer Park is easily accessible by car from JFK Blvd. at 63rd St. near the border of Bayonne & Jersey City. Main entrance at Merritt St. and Avenue C.

Bus
Merritt St. is serviced by the 80, 81, & 87 NJ Transit bus lines.

Amenities / Features of Mercer Park in Bayonne:

0-0 Main Categories & Types
Parks and Natural Areas
County Parks
0-0 Special Location and Tour Search Categories
All Activities
Activities
Baseball
Basketball
Playing in the playground
Walking
Amenities
Activity / Sport Area(s)
Sports / Athletic Fields
Lighted for night use
Bathrooms
Parking Lot(s)
Picnic / Sitting Area
Playground
Internal Data
For Locations / Guides
Misc Information
Listing Center: Latitude: 40.6919
Listing Center: Longitude: -74.1023
Record Status: 1.0000
Record Title: Mercer Park in Bayonne
Special Connections
County Park Systems
Hudson County Parks

Additional Mercer Park in Bayonne Content: