Florida takes Halloween very seriously, and every city and town holds some kind of a parade or festival in the last week of October. Disney World has a special kids program—Mickey's Not-So-Scary Halloween Party which already starts in mid-August. But most Halloween events in Florida take place from mid-September through October.
Halloween Horror Nights at Universal Resort (September 6–November 2, 2019)
The most popular event in Orlando is Halloween Horror Nights, held at Universal Resort, famous for its grotesque and dark haunted houses and scare zones. It's available between mid-September and early November.
The "Scare Zones," haunted houses have a specific theme and decoration. Houses lead visitors through a scary dark maze with various technical features designed to surprise, confuse, or terrify people with a combination of lights, fog, and other such things. Outdoor scare zones also have a certain theme and feature fog machines, strobe lights, scary decor and people dressed up as creatures.
Howl-O-Scream at Busch Gardens Tampa Bay (September 20–November 2, 2019)
This event competes with another festival in Central Florida. Howl-O-Scream is held at Busch Gardens Tampa Bay in Tampa between late September and late October. Their shows have a more traditional Halloween setting and feature dark humour and some scary scenery.
Halloween in Miami (late October)
Miami has it all from club parties to family-friendly events. There are also plenty of scary attractions and fun events during the Halloween season. One of the largest gatherings of all things spooky is HalloWYN Block Party at the Wynwood Marketplace in Downtown Miami with hundreds of zombies, warlocks and witches, lots of local food options from a few dozens of food trucks, and dances through the night. Families with kids of all ages can join Halloween costume contests of Halloween on the Mile in Coral Gables on October 31 or watch the festive animal enrichment during Zoo Boo at Zoo Miami on the last weekend of October. More details on Halloween in Miami are over here.