Manassas set no official trick-or-treat hours for Halloween, Saturday, Oct. 31. Fall-O-Ween runs 10 a.m. to 3 p.m. on the museum lawn. Police: 703-257-8000.

Last checked Oct. 31, 2026. This page is updated each year. Sources: the Historic Manassas Inc. calendar, the City of Manassas October 2026 City Connection and the Prince William County events calendar. and the Visit Manassas listing for Fall-O-Ween.

The City of Manassas set no official trick-or-treat hours for 2026. Halloween falls on Saturday, Oct. 31, and families decide their own times. On the day, Old Town Manassas Fall-O-Ween runs from 10 a.m. to 3 p.m. on the Manassas Museum lawn. The other organized events, Haunted Happenings downtown on Oct. 24 and the police trunk-or-treat at Manassas Mall on Oct. 28, have been held. To report a safety concern on Halloween night, call the Manassas City Police non-emergency line, 703-257-8000, or 911 in an emergency.

Updated Oct. 31: no hours were announced; Haunted Happenings, the trunk-or-treat and the other October events are marked as held; Fall-O-Ween added.

What this means for you

  • No city curfew or set hours were published. Go out when it suits your family and your street.
  • Want a planned event? Fall-O-Ween, Oct. 31, 10 a.m. to 3 p.m., Manassas Museum lawn: kids’ costume parade at 1 p.m., pet costume parade at 2:30 p.m.
  • Drivers: the city asks everyone to slow down, stay alert and watch for children on Halloween.

Trick-or-treat and trunk-or-treat events

Date Event Where Cost
Sat., Oct. 31, 10 a.m. to 3 p.m. Old Town Manassas Fall-O-Ween: crafts, games, treats, costume parades for kids (1 p.m.) and pets (2:30 p.m.) Manassas Museum lawn, 9101 Prince William St. Not listed

Already held this year:

Date Event Where Cost
Sat., Oct. 24, 10 a.m. to 2 p.m. Haunted Happenings: trick-or-treating at downtown shops and restaurants, costume contest Historic Downtown Manassas Free
Wed., Oct. 28, 5:30 to 8 p.m. Prince William County Police Trunk or Treat Manassas Mall, 8300 Sudley Road Free
Fri., Oct. 30, 5:30 to 8 p.m. Fright Night Movie Night City of Manassas Community Center, 8750 Sudley Road Ask the city

Haunted Happenings is run by Historic Manassas Inc. (HMI). Children dress up and stroll downtown collecting treats from participating businesses; this year adds a costume contest. The 2025 event ran on Saturday, Oct. 25, and the 2026 event on Oct. 24, the Saturday before Halloween both years.

The Manassas Mall trunk-or-treat is held by the Prince William County Police Department in the mall parking lot, in Prince William County just outside the city line. It is open to everyone.

Fright Night Movie Night is listed in the city’s October City Connection under the community center’s programs. For details call Parks, Culture and Recreation at 703-257-8315.

Older kids and adults

These October events have been held; they are kept here as a guide to next year.

  • Factory of Fear: Outbreak, the ARTfactory’s four-floor haunted house at 9419 Battle St., 7 p.m. Thursday to Saturday, Oct. 22-24. $25. Tickets.
  • City Cemetery tours from the Manassas Museum, Friday, Oct. 23, at 6:30 and 7:30 p.m. $10. Register on RecDesk.
  • Book talk: Haunted Fauquier County, 6 p.m. Saturday, Oct. 24, Manassas Museum, 9101 Prince William St. Free.

Halloween safety

In the October City Connection, the city’s leadership asked parents, caregivers and drivers to make children’s safety a priority: stay alert, drive slowly, and make sure children are visible and with a responsible adult. In practice:

  • Give children a flashlight, or add reflective tape to dark costumes.
  • Walk on sidewalks and cross at corners.
  • Drivers: slow down on neighborhood streets after dark.
  • Check candy at home before children eat it.

Daylight saving time ends at 2 a.m. Sunday, Nov. 1, the night after Halloween.

Phone numbers: Manassas City Police non-emergency, 703-257-8000; emergency, 911.

More in Manassas

Frequently asked questions

What are the trick-or-treat hours in Manassas, Virginia, for 2026?

The City of Manassas did not publish official trick-or-treat hours for 2026. Halloween is Saturday, Oct. 31, and families set their own times.

Is there a daytime Halloween event in Manassas on Oct. 31?

Yes. Old Town Manassas Fall-O-Ween runs 10 a.m. to 3 p.m. Saturday, Oct. 31, on the Manassas Museum lawn, 9101 Prince William St., with a kids’ costume parade at 1 p.m. and a pet costume parade at 2:30 p.m. Haunted Happenings, the downtown shop trick-or-treat, was held Oct. 24.

Was there a trunk-or-treat near Manassas?

Yes. The Prince William County Police Department held a free Trunk or Treat on Wednesday, Oct. 28, at Manassas Mall, 8300 Sudley Road, just outside the city line.

Who do I call about a safety concern on Halloween night?

The Manassas City Police non-emergency line, 703-257-8000. Call 911 in an emergency.