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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 (186,288)
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Shopper Testimonials
“I love these cards. It is great to be able to personalized them. And the delivery is very quick.”
Cathy - Jun 1st, 2025
“The cards are always good quality and arrive quickly. I love how there are so many options to find the perfect card and then personalize it. Will continue ordering from Greeting Card Universe.”
Janet - May 31st, 2025
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Cards per Page:
Cards: 615 Pages: 21
Most Popular Newest Show adult cards
Happy 21st Birthday, Pink Roses card
21st Birthday You Have Been Loved for 21 Years car…
21st Birthday Custom Photo Bright Balloons and Con…
Happy 21st Birthday, balloons, streamers card
21 Celebration boy card
21 Years Old Birthday Cards Humorous Monkey card
Happy Birthday Bee Safe 21 Sober Paper Card
Chalk Board Birthday Wishes, 21st Birthday Lesson …
Happy Birthday Stage 21 card
Happy 21st Birthday card
Paper greeting card, happy birthday, party, 21, tw…
Happy 21st Birthday - For Him card
21st Birthday Giant Ice Cream card
Custom 21st Birthday White Hummingbirds on Cherry …
Lady in Birthday Hat-21st Birthday card
21st Birthday card with fireworks card
Cheers! It’s Your 21st Birthday card
Humorous 21st Birthday Card You’ve Turned 21 Own P…
Muscle Man 21st Birthday Card
Birthday,21st, Hint of Grunge on Shades of Gray St…
Happy 21st Birthday with Typewriter Glasses & Sunb…
Congratulations on Not Barfing on Your 21st Birthd…
Happy 21st Birthday Garden Bouquet card
Happy 21st Birthday!! card
Happy 21st Birthday Horse in Sunset card
Happy Birthday age 21 Pink and Gold Balloons Confe…
Birthday Age 21 Male Jumping with Light Dust and E…
On Your 21st Birthday Dream Big with Hot Air Ballo…
Happy 21st Birthday Cartoon Cats Holding a Pink He…
Golden Birthday Turning 21 on the 21st Custom Mont…
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