Most areas will stick to the standard time of 6-8 p.m. on Oct. 31, but a few cities and villages will deviate.
In Campbell County, Highland Heights and Southgate have different trick or treat times.
In Butler County, Madison Township, Middletown and Oxford will have a trick-or-treat time of 5:30-7:30 p.m. In Trenton, the time is from 5:30-7 p.m.
In Warren County, the trick-or-treat time is from 5:30-7:30 p.m. in Lebanon.
Here's when to expect costumed door-to-door trick-or-treating:
BOONE COUNTY
Unincorporated Boone County: 6-8 p.m. Oct. 31
Florence: 6-8 p.m. Oct. 31
Walton: 6-8 p.m. Oct. 31
CAMPBELL COUNTY
Unincorporated Campbell County: 6-8 p.m. Oct. 31
Alexandria: 6-8 p.m. Oct. 31
Bellevue: 6-8 p.m. Oct. 31
Cold Spring: 6-8 p.m. Oct. 31
Dayton: 6-8 p.m. Oct. 31
Fort Thomas: 6-8 p.m. Oct. 31
Highland Heights: 6-7:30 p.m. Oct. 31
Newport: 6-8 p.m. Oct. 31
Southgate: 5:30-7:30 p.m. Oct. 31
Silver Grove: 6-8 p.m. Oct. 31
Wilder: 6-8 p.m. Oct. 31
KENTON COUNTY
Unincorporated Kenton County: 6-8 p.m. Oct. 31
Covington: 6-8 p.m. Oct. 31
Crescent Springs: 6-8 p.m. Oct. 31
Crestview Hills: 6-8 p.m. Oct. 31
Edgewood: 6-8 p.m. Oct. 31
Elsmere: 6-8 p.m. Oct. 31
Erlanger: 6-8 p.m. Oct. 31
Fort Mitchell: 6-8 p.m. Oct. 31
Fort Wright: 6-8 p.m. Oct. 31
Independence: 6-8 p.m. Oct. 31
Lakeside Park: 6-8 p.m. Oct. 31
Ludlow: 6-8 p.m. Oct. 31
Park Hills: 6-8 p.m. Oct. 31
Taylor Mill: 6-8 p.m. Oct. 31
Villa Hills: 6-8 p.m. Oct. 31
HAMILTON COUNTY
Addyston: 6-8 p.m. Oct. 31
Anderson Township: 6-8 p.m. Oct 31
Blue Ash: 6-8 p.m. Oct. 31
Cheviot: 6-8 p.m. Oct. 31
City of Cincinnati: 6-8 p.m. Oct. 31
Cleves: 6-8 p.m. Oct. 31
Deer Park: 6-8 p.m. Oct. 31
Delhi Township: 6-8 p.m. Oct. 31
Evendale: 6-8 p.m. Oct. 31
Fairfax: 6-8 p.m. Oct. 31
Glendale: 6-8 p.m. Oct. 31
Green Township: 6-8 p.m. Oct. 31
Harrison: 6-8 p.m. Oct. 31
Indian Hill: 6-8 p.m. Oct. 31
Liberty Township: 6-8 p.m. Oct. 31
Lockland: 6-8 p.m. Oct. 31
Loveland: 6-8 p.m. Oct. 31
Madeira: 6-8 p.m. Oct. 31
Mariemont: 6-8 p.m. Oct. 31
Miami Township (Hamilton County): 6-8 p.m. Oct. 31
Milford: 6-8 p.m. Oct. 31
Montgomery: 6-8 p.m. Oct. 31
Mt. Healthy: 6-8 p.m. Oct. 31
Newtown: 6-8 p.m. Oct. 31
North Bend: 6-8 p.m. Oct. 31
Norwood: 6-8 p.m. Oct. 31
Pierce Township: 6-8 p.m. Oct. 31
Reading: 6-8 p.m. Oct. 31
Silverton: 6-8 p.m. Oct. 31
Sycamore Township: 6-8 p.m. Oct. 31
Symmes Township: 6-8 p.m. Oct. 31
Union Township: 6-8 p.m. Oct. 31
BUTLER COUNTY
Fairfield: 6-8 p.m. Oct. 31
Fairfield Township: 6-8 p.m. Oct. 31
Hamilton: 6-8 p.m. Oct. 31
Liberty Township: 6-8 p.m. Oct. 31
Madison Township: 5:30-7:30 p.m. Oct. 31
Middletown: 5:30-7:30 p.m. Oct. 31
Monroe: 6-8 p.m. Oct. 31
Oxford: 5:30-7:30 p.m. Oct. 31
Trenton: 5:30-7 p.m. Oct. 31
West Chester: 6-8 p.m. Oct. 31
CLERMONT COUNTY
Amelia: 6-8 p.m. Oct. 31
Batavia: 6-8 p.m. Oct. 31
Goshen Township: 6-8 p.m. Oct. 31
Miami Township (Hamilton County): 6-8 p.m. Oct. 31
Milford: 6-8 p.m. Oct. 31
New Richmond: 6-8 p.m. Oct. 31
Williamsburg: 6-8 p.m. Oct. 31
WARREN COUNTY
Deerfield Township: 6-8 p.m. Oct. 31
Lebanon: 5:30-7:30 p.m. Oct. 31
Maineville: 6-8 p.m. Oct. 31
Mason: 6-8 p.m. Oct. 31
Morrow: 6-8 p.m. Oct. 31
Waynesville: 6-8 p.m. Oct. 31