Kids Birthday Party Supplies

  • Shop All Party Kits
  • Shop All Boys Themes
  • Shop All Girls Themes
  • Unicorn
  • Mermaid
  • Vampirina
  • Wreck-It Ralph
  • PJ Masks
  • Jurassic World
  • L.O.L. Surprise!
  • Harry Potter
  • JoJo Siwa
  • Avengers
  • Sesame Street
of 12
View All
  • Girls Elsa Costume - Frozen Quick View
    Now $19.99 Was:$24.99
    Girls Elsa Costume - Frozen
    Review Rating: 4.50
    Online Only
  • Girls Ariel Costume - The Little Mermaid Quick View
    $19.99
    Girls Ariel Costume - The Little Mermaid
    Review Rating: 4.50
    Online Only
  • Girls Classic Tinker Bell Costume Quick View
    $19.99
    Girls Classic Tinker Bell Costume
    Review Rating: 4.50
    Online Only
  • Boys Classic Spider-Man Costume Quick View
    $19.99
    Boys Classic Spider-Man Costume
    Review Rating: 4.00
    Online Only
  • Toddler Boys Classic Spider-Man Muscle Costume Quick View
    $29.99
    Toddler Boys Classic Spider-Man Muscle Costume
    Review Rating: 5.00
    Online Only
  • Boys Captain America Classic Costume Quick View
    $19.99
    Boys Captain America Classic Costume
    Review Rating: 4.50
    Online Only
  • Boys Classic Police Officer Costume Quick View
    $29.99
    Boys Classic Police Officer Costume
    Review Rating: 4.50
  • Boys Rebel of the Sea Pirate Costume Quick View
    $26.99
    Boys Rebel of the Sea Pirate Costume
    Review Rating: 4.00
  • Boys Hulk Muscle Costume Quick View
    $29.99
    Boys Hulk Muscle Costume
    Review Rating: 5.00
    Online Only
  • Toddler Boys Hulk Muscle Costume Classic Quick View
    $29.99
    Toddler Boys Hulk Muscle Costume Classic
    Review Rating: 4.50
  • Girls Anna Coronation Costume - Frozen Quick View
    $34.99
    Girls Anna Coronation Costume - Frozen
    Review Rating: 5.00
    Online Only
  • Child Gryffindor Robe - Harry Potter Quick View
    $24.99
    Child Gryffindor Robe - Harry Potter
    Review Rating: 4.00
    Online Only
  • Toddler Girls Sofia the First Costume Quick View
    $24.99
    Toddler Girls Sofia the First Costume
    Review Rating: 4.50
    Online Only
  • Girls Rapunzel Costume - Tangled Quick View
    $19.99
    Girls Rapunzel Costume - Tangled
    Review Rating: 4.50
  • Boys Classic Spider-Man Muscle Costume Quick View
    $29.99
    Boys Classic Spider-Man Muscle Costume
    Review Rating: 4.50
  • Toddler Boys Captain America Muscle Costume Classic Quick View
    $29.99
    Toddler Boys Captain America Muscle Costume Classic
    Review Rating: 4.50
  • Girls Elsa Costume Premier - Frozen Quick View
    $34.99
    Girls Elsa Costume Premier - Frozen
    Review Rating: 4.00
    Online Only
  • Girls Anna Costume - Frozen Quick View
    Now $14.99 Was:$24.99
    Girls Anna Costume - Frozen
    Review Rating: 4.50
    Online Only
  • Boys Superman Muscle Costume - Justice League Part 1 Quick View
    $29.99
    Boys Superman Muscle Costume - Justice League Part 1
    Review Rating: 4.00
  • Boys Black Panther Muscle Costume - Black Panther Movie Quick View
    $39.99
    Boys Black Panther Muscle Costume - Black Panther Movie
    Review Rating: 4.50
  • Girls Violet Costume - The Incredibles Quick View
    $39.99
    Girls Violet Costume - The Incredibles
    Review Rating: 4.00
    Online Only
  • Boys Classic Batman Muscle Costume - The Brave & the Bold Quick View
    $29.99
    Boys Classic Batman Muscle Costume - The Brave & the Bold
    Review Rating: 4.00
  • Boys Captain America Costume Classic Quick View
    $19.99
    Boys Captain America Costume Classic
    Review Rating: 5.00
    Online Only
  • Boys Thor Muscle Costume - The Avengers Quick View
    $29.99
    Boys Thor Muscle Costume - The Avengers
    Review Rating: 5.00
    Online Only
  • Child Hufflepuff Robe - Harry Potter Quick View
    $24.99
    Child Hufflepuff Robe - Harry Potter
    Review Rating: 3.50
    Online Only
  • Girls Moana Costume Quick View
    $29.99
    Girls Moana Costume
    Review Rating: 5.00
  • Toddler Boys Catboy Costume - PJ Masks Quick View
    $34.99
    Toddler Boys Catboy Costume - PJ Masks
    Review Rating: 4.50
  • Girls Cinderella Costume Quick View
    $39.99
    Girls Cinderella Costume
    Online Only
  • Toddler Olaf Costume - Frozen Quick View
    Now $14.99 Was:$24.99
    Toddler Olaf Costume - Frozen
    Review Rating: 4.50
    Online Only
  • Boys Reflective Firefighter Costume Quick View
    $29.99
    Boys Reflective Firefighter Costume
    Review Rating: 4.50
  • Boys Stormtrooper Costume - Star Wars Quick View
    $24.99
    Boys Stormtrooper Costume - Star Wars
    Review Rating: 4.50
    Online Only
  • Girls Anna Costume - Frozen Quick View
    Now $24.99 Was:$34.99
    Girls Anna Costume - Frozen
    Review Rating: 5.00
    Online Only
  • Boys Batman Muscle Costume Quick View
    $29.99
    Boys Batman Muscle Costume
    Review Rating: 5.00
  • Girls Diva Costume Deluxe - L.O.L. Surprise Quick View
    $39.99
    Girls Diva Costume Deluxe - L.O.L. Surprise
    Review Rating: 3.00
    Online Only
  • Boys Classic Batman Costume - The Brave & the Bold Quick View
    $19.99
    Boys Classic Batman Costume - The Brave & the Bold
    Review Rating: 5.00
  • Girls Red Minnie Mouse Costume Quick View
    $24.99
    Girls Red Minnie Mouse Costume
    Review Rating: 4.00
    Online Only
of 12 Next
View All

Discover our Incredible Collection of Themed Kids Birthday Party Decorations

Are you ready to put together an impressive kids birthday party? Party City can help you get started. Our collection of kids birthday party supplies and decorations can help you create a festive mood in no time. No matter what your child enjoys – be it video games, superheroes, movies, animals, toys or fantasy – Party City offers supplies for dozens of kids party themes so they can have the best day ever. You’re sure to find everything you need to create an amazing celebration!