Halloween Trunk-or-Treats & Costume Events

Your 2026 Guide to Halloween Fun Around Princeton, Hamilton & Mercer County

Looking for family-friendly Halloween fun? We've rounded up trunk-or-treats, costume events, Halloween parties, parades, trick-or-treating and more happening throughout our local area!

🎃 12 ZIP CODES COVERED:
08512 • 08528 • 08536 • 08540 • 08542 • 08544 • 08550 • 08610 • 08619 • 08648 • 08690 • 08691

🎃 Quick Find

Sensory-Friendly Trunk-or-Treat

📅 Saturday, October 10
⏰ 10 AM–12 PM
📍 Bierman Autism Centers, 746 Alexander Rd., Princeton
💰 FREE

A sensory-friendly Halloween experience featuring decorated trunks, games, face painting and crafts. Costumes are welcome but not required.

LPAC's Super Sweet Trunk-or-Treat

📅 Sunday, October 18
⏰ 4 PM
📍 1800 NJ-33, Suite 101A, Hamilton Square
💰 FREE

Decorated trunks, trick-or-treating, crafts, activities and an UpLevel performance.

Robinson PTA Trunk-or-Treat

📅 Friday, October 23
📍 Robinson Elementary School, 495 Gropp Ave., Hamilton
🌧️ Rain date: Wednesday, October 28

A family-friendly school Trunk-or-Treat featuring decorated cars and Halloween fun.

Mercer County Park Trunk-or-Treat

📅 Friday, October 23
⏰ 5–7:30 PM
📍 Mercer County Park Festival Grounds, 1638 Old Trenton Rd., Robbinsville
💰 FREE

Trunk-or-treating, pumpkin painting, hayrides, games, music and vendors. Costumes encouraged!

Halloween at Historic Schenck Farmstead

📅 Saturday, October 24
⏰ 2–4 PM
📍 Historic Schenck Farmstead, 50 Southfield Rd., West Windsor
💰 FREE

Decorated trunks, candy and Halloween fun, plus the Red, White & BOO! Scarecrow Competition.

Autism-Friendly Trunk-or-Treat

📅 Wednesday, October 28
⏰ 5–7 PM
📍 Children's Specialized ABA, 116 Village Blvd., Princeton
💰 FREE

A less-scary, sensory-friendly Halloween celebration with allergy-friendly treats.

St. Paul School Trunk-or-Treat

📅 Friday, October 30
📍 St. Paul School, 218 Nassau St., Princeton

Grab the costumes and enjoy Halloween fun at the school's annual Trunk-or-Treat.

Mercer County Children's Collaborative Trunk-or-Treat

📅 Thursday, October 22
⏰ 6–8 PM
📍 Mercer CMO, 3535 Quakerbridge Rd., Hamilton

Decorated trunks, candy, costumes and a trunk-voting contest.

CCC Youth Ministry Fall Festival

📅 Saturday, October 31
⏰ 5–7:30 PM
📍 Christ Centered Church, 4 Tennis Court, Hamilton
💰 FREE

Free food, games, game truck and trunk-or-treating.

Pond Road Middle School Trunk-or-Treat

📍 Pond Road Middle School, 150 Pond Rd., Robbinsville

A community Trunk-or-Treat event hosted by Pond Road Middle School.

Halloween Costume Swap

📅 Sunday, October 11
⏰ 12 PM
📍 Tulpehaking Nature Center, 157 Westcott Ave., Hamilton

Bring a costume to swap or choose one to take home. Costumes are available for kids, adults and pets. Face painting and a turtle talk are also included.

Haunted Tonight

📅 Saturday, October 24
⏰ 1–4 PM
📍 Plainsboro Municipal Grounds, 641 Plainsboro Rd.
💰 FREE

Trick-or-Treat Village, pumpkin patch, hayrides, Halloween games, crafts, music and entertainment. Costumes encouraged!

Success On The Spectrum Halloween Family Fun

📅 Saturday, October 24
⏰ 12–2:30 PM
📍 1225 Whitehorse Mercerville Rd., Hamilton
💰 FREE

Costumes, trick-or-treating, face painting, bouncy house, games and emergency vehicles.

Trail & Treat

📅 Sunday, October 25
⏰ 3–5 PM
📍 Village Park, Yeger Drive, Lawrenceville

A family-friendly Halloween bike ride featuring treats, face painting, music and multiple route options.

Halloween Fright Fun Party

📅 Tuesday, October 27
⏰ 6:15 PM
📍 West Windsor Branch Library, 333 N. Post Rd.
👧 Ages 6–11

Halloween activities, games, crafts and trick-or-treating. Costumes encouraged. Registration required.

Robbinsville Branch Library Halloween Party

📅 Wednesday, October 28
⏰ 3 PM
📍 Robbinsville Branch Library
👧 Ages 5+

Games, crafts and snacks. Costumes encouraged.

50th Annual Hometown Halloween Parade

📅 Friday, October 30
⏰ Gather at 4 PM • Parade begins at 4:30 PM
📍 Princeton Green → YMCA

Costumes, the Princeton University Band, a Halloween parade and free family fun at the YMCA afterward.

Cranbury School Halloween Parade

📅 Friday, October 30
⏰ 1:45–2:15 PM
📍 Cranbury School, 23 N. Main St.

A school Halloween parade followed by classroom Halloween parties.

School of Rock Princeton Halloween Party

📅 Friday, October 30
⏰ 7–9 PM
📍 School of Rock Princeton, 1761 Princeton Ave., Lawrenceville
💰 FREE

Halloween music and a costume contest with a Beetlejuice-inspired theme.

Hamilton Elks Halloween Party

📅 Friday, October 30
⏰ 7–11 PM
📍 1580 Kuser Rd., Hamilton
💰 $15/person

Halloween music, dancing and costumes. Open to the public.

Princeton University Museum After Dark

📅 Thursday, October 29
⏰ 7–10 PM
📍 Princeton University Art Museum
💰 FREE

A Halloween-themed evening featuring a costume contest, art making, silent disco and late-night museum access.

Halloween with Sinfonia

📅 Friday, October 30
⏰ 7:30 PM
📍 Richardson Auditorium, Princeton

A Halloween-themed concert presented by Sinfonia.

Princeton Trick-or-Treat

📅 Saturday, October 31
⏰ 6–8 PM
📍 Princeton

Grab your trick-or-treat bags and enjoy Halloween night in Princeton.

Know of a Halloween Event We're Missing?

Help us keep this guide up to date! If your organization is hosting a trunk-or-treat, costume contest, Halloween party, parade or family-friendly Halloween event, submit it to our Macaroni KID calendar or reach out to amandast@macaronikid.com.

More events will be added as details become available!