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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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Birthday (187,657)
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Shopper Testimonials
“I love these cards! Good quality, great price, and very specific occasions available such as Valentines Day birthday, New Years Eve birthday, etc.”
Martha Lind - Sep 15th, 2025
“Another beautiful card. This is the only place I buy my greeting cards. They are always perfect and the personalization makes them so much better than any card you can pick up at a store, plus they're even more affordable. Highly recommend Greeting Card Universe!”
Kim - Sep 15th, 2025
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Cards per Page:
Cards: 619 Pages: 21
Most Popular Newest Show adult cards
21 Years Old Steampunk Birthday card
21 years Old Happy Birthday Mummy card
21 Years Old Happy Birthday Herd card
21 Years Old Happy Birthday Vampire Count with Cak…
21 Years Old Happy Birthday Goofy Cartoon Tiger Ro…
21 Years Old Happy Birthday Crashtest Dummy with B…
21 Years Old Happy Birthday Kawaii Queen Bee with …
21 years Old Happy Birthday Mummy with Cake card
21 Years Old Happy Birthday Steampunk Hamsters car…
21 Years Old Happy Birthday Flower Power Hippy Cou…
21 Years Old Happy Birthday Robots card
21 Years Old Happy Birthday Cute Octopus with Birt…
21 Years Old Happy Birthday Zombie with Cupcake ca…
21 Years Old Happy Birthday Smiling Cartoon Lion c…
21 Years Old Happy Birthday Little Bird with Prese…
21 Years Old Happy Birthday Siamese Cat Playing Gu…
21 Years Old Happy Birthday Cool Berries card
21 Years Old Happy Birthday Bear with Birthday Cak…
21 Years Old Happy Birthday Bear with Red Balloon …
21 Years Old Happy Birthday Ginger Kitty with Cake…
21 Years Old Happy Birthday Cake card
21 Years Old Happy Birthday Cartoon Female Pirate …
21 Years Old Happy Birthday Latina Mermaid card
21 Years Old Happy Birthday Kawaii Bee with Cowboy…
21 Years Old Happy Birthday Zombie Monsters card
21 Years Old Happy Birthday Ginger Cat with Magnif…
21 Years Old Happy Birthday Cute Panda Bear card
21 Years Old Happy Birthday Cartoon Karate Kick Gi…
21 Years Old Frog Hoppy Birthday card
21 Years Old Happy Birthday Flamingo card
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