About Us

Welcome to Mr. Boo Costumes!

Mr. Boo Costumes started the way all the best Halloween stories start — with a family that loves October a little too much. Based in Olathe, Kansas, we're a family-run shop built by people who believe Halloween isn't just a holiday, it's a whole season worth celebrating.

We carry spooky-to-silly outfits for all ages: kids, adults, and even your four-legged trick-or-treaters. From creepy classics and pop-culture favorites to hilarious inflatables, plus masks, wigs, props, and accessories to finish every look, we've got the costume that makes you the star of the party.

We're Halloween-obsessed so you don't have to stress. We keep costume shopping simple, fun, and affordable — easy browsing, honest sizing guidance, and looks for every budget. Whether you're planning months ahead or scrambling the week before the big night, we're here to help you find something you'll love wearing.

So dig in, get inspired, and let's make this your best Halloween yet. Happy haunting!

Have a question about sizing, shipping, or a bulk order? Reach out anytime at fashionationusa3@gmail.com — a real human (probably in a costume) will get back to you within 1 business day. Thanks for shopping small and shopping spooky with Mr. Boo Costumes!