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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 (191,129)
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Shopper Testimonials
“Greeting Card Universe provides the perfect personalized cards for any occasion. I especially love the age specific birthday cars for kids. The recipients love seeing their picture and name in the birthday card.”
Michelle - Sacramento, CA - Oct 4th, 2026
“Card is beautiful, very kind message. Nice to be able to send a card quickly in the USA as needed for any occasion.”
Ellen - Oct 3rd, 2026
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Cards per Page:
Cards: 635 Pages: 22
Most Popular Newest Show adult cards
Add A Name 21st Birthday Footballs card
21st Birthday Toasting Wine Glasses Funny Custom C…
21st Birthday Red Wine, Turning 21, Wine Funny 21s…
Happy Birthday - cake - 21 years old card
21st Happy Birthday Colorful Typography card
21st Happy Birthday Card - Summer bouquet card
Happy Birthday to 21 - White Hearts card
Happy 21st Birthday, Hawaiian Sunrise card
21st Birthday Humor Silhouetted Black Crows in Tre…
21st Birthday, Raccoons with party hats and colorf…
Happy 21st Birthday Concept Nostalgic American Pic…
21st Birthday, Golf Jokes card
All is Calm/by Sea - 21st - Birthday- Marina Sunse…
Happy 21st Birthday, Red Dahlia card
21st Birthday - Hitting 21 card
Client request Kaitlyn’s 21st birthday, United Sta…
Cute and Funny Dog You Look Good Happy 21st Birthd…
Happy 21st Birthday Cute Cupcake Character in Part…
21st Birthday Guitar Player Plectrum Tucked into S…
Happy 21st Birthday Celebration with confetti and …
Happy 21st Birthday Wish, Tiger card
21st Birthday card, Flowers and Pearls card
Happy 21 st Birthday card
Happy 21st Beer Birthday Funny Card
Funny 21st Birthday Card
Happy 21st Birthday Party Cake card
Happy birthday for 21 year old, Jazz cats play mus…
Happy 21st Birthday Boxer Dog card
Happy 21st Birthday Magical Unicorn Fun card
21st Birthday card
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