These are the parks thicket knows about in Union — the big ones you already know, and the pocket parks, greenways and trailheads two streets over that you probably do not.
- 9/11 Memorial Park
- Ash Brook Reservation
- Baseball Field Neck Ln
- Berzinec Park
- Biertempful Park
- Blackbrook Park
- Boxwood Hall State Historic Site
- Boy Scout Camping Area, Watchung Reservation
- Brennan Field
- Briant Park
- Brightwood Park
- Brookside Park
- Brunner Park
- Cacciola Mini Park
- Caldwell Park
- Carriage House Park
- Carteret Park
- Cedar Brook Park
- Centennial Park
- Chandler Park
- Charles Cohn Memorial Park
- Charles E. Vitale Jr. Park
- Clark Memorial Park
- D.A.R.E Park
- Deerfield Park
- Denham Park
- Dr. Charles C. Polk Memorial Park
- Drotar Park
- Edgar "Hot Dog" Acker Park
- Eleanor Erickson Park
- Elizabeth River Park
- Esther Egbert Park
- Fanwood Borough Hall Basin
- Fanwood Borough Hall Lawn
- Fanwood Nature Center
- Farley Road Park
- Fifth Ward Park
- Forest Road Park
- Foundation Park
- Fourth Ward Park
- Friberger Park
- Garwood Park
- Girl Scout Park
- Girl Scout Park
- Green Acres Park
- Green Brook Park
- Greenside Playground
- Grove Street Park
- Gumbert Park
- Hagedau Park
- Hampton Park
- Hansen Park
- Harry E. Hartman Memorial Park
- Hidden Valley Park
- Historic Fanwood Train Station Park
- Hoover Park
- Irene Hoppe Park
- Jackson corner park
- Jackson Park
- Jaycees Park
- Jefferson Park
- Jerseyland Park
- Joe Collins Park
- Kellogg Park
- Kenah Field
- Lagrande Park
- Lamonaco Perry Memorial Park
- Leonard Bud Simmons Park
- Lightning Brook Park
- Lincoln Field
- Lincoln Park
- Lincoln Park
- Lions Park
- Lynch Memorial Park
- Madden Field
- Madison Avenue Park
- Marciante-Millet-Jackson Park
- Mathewson Park
- Mattano Park
- McConnell Park
- McGinn Playground
- Meisel Avenue Park
- Memorial Park
- Memorial Park and Pool
- Michael J. Mauri Park
- Michigan Park
- Miller Playground
- Milton Lake Park
- Mindowaskin Park
- Neighborhood Triangle
- Newton Park
- Ninth Street Park
- Nomahegan Park
- Notherwood Park
- O'Brien Park
- Oak Ridge Park
- Oakwood Park
- Park at the Fanwood Memorial Library
- Passaic River Park
- Patriot Park
- Peach Orchard Park
- Peppertown Park
- Ponderosa Farm Park
- Rabkin Park
- Rahway River Park
- Robert E. Jeans Veterans Memorial Park
- Ruby Park
- Saint Marks Park
- Salvatore M. Mione Park
- Scott Park
- Seeley's Pond Picnic Grounds
- Sherman Park
- Sichel Park
- Sixteenth Street Park
- Snyder Avenue Park
- Sperry Park
- Sperry Park (North Section)
- Springfield Veterans Memorial Park
- Stein Field
- Sunny Side Park
- Tamaques Park
- Tatlock Sports Complex
- Theodore Roosevelt Park
- Todd Bowles Waterfront Sports Complex
- Tully Field
- Unami Park
- Veteran's Memorial Waterfront Park
- Veterans Honor roll & Memorial Park
- Veterans Memorial Field
- Veterans Memorial Park
- Veterans Memorial Park
- Village Green Memorial Day Statue
- Village Green Public Art
- Village Green Recreational Area
- Warinanco Park
- Washington Avenue Park
- Watchung Reservation
- Weber Park
- Weiser Park
- Westfield Girl Scout Park
- Wheeler Park
- Wilson Park
- Windsor Park
- Woodruff Circle Park
- YMCA Park
- YMCA Park