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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 (187,620)
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Shopper Testimonials
“First time buyer from GCU, and the quality is amazing, w/ heavy card stock, nice envelope, and the custom greeting was perfect. My daughter's 40th is coming up and as a special birthday, I am planning on sending a personalized card for each day prior to her big day and I will definitely be buying from GCU. Thank you!”
Meredith Miller - Sep 12th, 2025
“I still thank my friends the Lobers for introducing me to Greeting Card Universe. When I have to purchase cards there is no other place like yours I tell everyone about it.”
KELLY - Sep 11th, 2025
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Cards per Page:
Cards: 618 Pages: 21
Most Popular Newest Show adult cards
21 Years Old Happy Birthday Kawaii Bee with Birthd…
21st Birthday, Religious - May God Bless you with …
Happy 21st Birthday - Lavender Swirls card
Custom Birthday for Age Specific Colorful Floating…
21st Birthday Red Tulips for Her card
21st Birthday with Crown and Gold Look Dots on Pea…
Happy 21st Birthday Getting Older Cranky Old Lady …
21st Birthday Seahorse and Shells Watercolor Effec…
Cats 21st Birthday (Bud & Tony) card
21 years old - Birthday - Holy Mackerel card
21st Birthday Rowing a Kayak on the Lake card
21st Birthday Little Springy Cartoon Cow card
21st Birthday - Humorous, Whimsical Card with Hipp…
Humorous 21st Birthday Card My Baby’s All Grown Up…
Customizable Age Happy 21st Birthday Fox Bunny Cat…
21 Black Jack card
Birthday, 21st, Explosion of vivid colors and star…
Happy 21th Birthday Circles and Flowers card
Birthday Customized for Any Age Hummingbird with H…
Happy 21st Birthday Card - Black & Turquoise Flowe…
21st Birthday, Zombie Hand writing a message in dr…
For Customized Age Twenty One Birthday Bald Eagle …
Customized Age Birthday Twenty First Yellow Calla …
Twenty First Birthday Card With Roman Character Ha…
Custom Age 21 Birthday Autumn Milkweed Seeds card
Twenty One Year Old Birthday Wishes Luna Moth and …
Happy 21st Birthday Cute Squirrel in Party Hat Hum…
License Plates Happy 21st Birthday Card Car Lover …
21st Birthday with Golden Butterflies card
Zebra Print Kaleidoscope Design for 21st Birthday …
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