It just wouldn't be October without the return of Frightgeist — that Google Trends feature that tracks the most searched Halloween costumes across America. So whether you want to blend in with the crowd or stand out from the pack, check out the top trending Halloween costumes of 2017.

1. Wonder Woman

It's no surprise that the Amazon warrior tops the list of trending costumes after the success of the 'Wonder Woman' standalone film earlier this year. Golden lassos will be especially popular in West Virginia, Montana and Texas. And Wonder Woman won't be the only superhero keeping the streets safe. According to Google, 11 percent of costume searches involve comic book characters, which must make DC and Marvel pretty happy.   

2. Harley Quinn

Gotham City's psychotic psychologist is among the top trending costumes for the second straight year after skyrocketing to popularity thanks to Margot Robbie's portrayal of her in 'Suicide Squad.' Harley Quinn is particularly popular in Wyoming, West Virginia and Montana. So if that's your neck of the woods, you might want to hand out tea along with candy this year.

3. Clown/IT

Killer clowns are popular once again following the unexpected success of the 2017 film adaptation of Stephen King's 'IT.' Pennywise will stalk the streets of Maine, South Dakota and Montana and other states this year while generic clowns terrorize coulrophobiacs in Wyoming, Ohio and New York.

And don't be surprised if some old-school horror buffs dress up as 'IT' a la Tim Curry's portrayal from the 1990 adaptation. 

4. Unicorn

Herds of one-horned horses will be stampeding through the country, especially in Ohio, West Virginia and Wyoming. And don't be surprised if you see other mythical creatures roaming America. According to Trends, fantasy characters represent 7 percent of Google costume searches. So you might see unicorns clash with red bulls this Halloween. 

5. Rabbit

Two kinds of rabbits are popular this year. The white rabbit that served the Queen of Hearts in 'Alice in Wonderland.' And the sultry Jessica Rabbit, who got mixed up with the animated underworld in 'Who Framed Roger Rabbit?' Hopefully nobody goes around spraying either rabbit with Judge Doom's cartoon-killing sludge.

Bonus: Costume Wizard

This year, Frightgeist features a Costume Wizard, which suggests outfits based on how spooky, how modern and how trendy you want to be. So if you're looking for something super scary and unique, Google says go as the Grim Reaper. Just be sure to limber up before playing Twister against Bill and Ted.