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21st Birthday Cards

Drink ... drank ... drunk? Not too much, we hope. Send a 21st Birthday Card to someone who has hit that milestone like a boss and is ready to celebrate. Choose from 790+ exceptional designs, add your personal message, and we'll mail it next business day. Throwing a party? No worries. We have 21st Birthday Party Invitations, too. Yeah, 'cause we're cool like that.

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Shopper Testimonials
“Purchased 5 for discount, fast shipping and great price. Frequent customer for great quality.”
Dave - Jul 21st, 2025
“I have been ordering from Greeting Card Universe for a few years now. Great selection and I love that I can personalize the inside of each card. I get many complements about the cards and always make sure to tell everyone where they came from.”
Kathleen - Jul 21st, 2025
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Cards per Page:
Cards: 616 Pages: 21
Most Popular Newest Show adult cards
21st Birthday Colorful Cupcakes Tier Customizable …
Happy Birthday, 21st, You are A star, Starfish and…
21st Birthday Cats (Bud & Tony) card
Happy 21st Birthday Husky and Rose Cute and Fun ca…
Happy Birthday - 21 years old Blue Tie Dye card
No trout about it - 21 years old card
A seascapes 21st birthday card
Happy 21th birthday, key card
Happy 21st Birthday, Gold Fish, Witty, Elegant, Cu…
21st birthday - Bird in birch tree card
21st Birthday, Curious Owls card
Finally 21 Birthday card
Sparkly candles -21st Birthday card
21st Birthday Religious Blessings with Black Swirl…
Happy Birthday 21 Year Old - Girl cat goes shoppin…
Hurray! it’s your 21st birthday card
Happy 21st Birthday, Hope It’s Suey’t! Party Pig c…
21st Birthday Watercolour Floral Cake with Candles…
Custom Name 21st Birthday Bright Colours Hip Hip H…
21st Birthday Add a Name Abstract Mandala Design c…
21st Birthday, Hearts Trumps Whist card
Happy 21st Birthday card
Happy 21st Birthday for Someone Special, Purple As…
Sober As A Judge card
Blush Pink Watercolor Flowers 21st Birthday Card
21st Birthday Greeting Bold and Colorful Comic Boo…
Happy 21th Birthday Hearts card
Customizable 21st Birthday Baby and Gifts for Brid…
21st Birthday -- Creative Card Bytes card
21st Birthday Guy Humor card
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