Birthdays are the perfect time for laughter, surprises, and of course, good old knock-knock jokes! Whether you’re celebrating a friend, a family member, or even your own special day, these birthday-themed jokes are guaranteed to bring a smile. From classic puns to milestone birthday giggles, here are the best knock-knock jokes for every celebration.
Birthday Knock Knock Jokes
- Knock, knock.
Who’s there?
Cake.
Cake who?
Cake a break, it’s your birthday! - Knock, knock.
Who’s there?
Candles.
Candles who?
Candles fit on this cake, or do we need more? - Knock, knock.
Who’s there?
Ice cream.
Ice cream who?
Ice cream every year on my birthday! - Knock, knock.
Who’s there?
Party.
Party who?
Party time—it’s your birthday! - Knock, knock.
Who’s there?
Gift.
Gift who?
Gift me cake or gift me presents! - Knock, knock.
Who’s there?
Balloon.
Balloon who?
Balloon up the candles, it’s your birthday wish time! - Knock, knock.
Who’s there?
Present.
Present who?
Present yourself, it’s birthday cake o’clock! - Knock, knock.
Who’s there?
Wish.
Wish who?
Wish you a happy birthday! - Knock, knock.
Who’s there?
Frosting.
Frosting who?
Frosting on the cake for your special day! - Knock, knock.
Who’s there?
Cupcake.
Cupcake who?
Cupcake and eat it too—it’s your birthday!
Knock Knock Jokes About Birthdays
- Knock, knock.
Who’s there?
Birthday.
Birthday who?
Birthday cake is waiting for you! - Knock, knock.
Who’s there?
Party hats.
Party hats who?
Party hats off to you on your birthday! - Knock, knock.
Who’s there?
Gift bag.
Gift bag who?
Gift bag full of surprises just for you! - Knock, knock.
Who’s there?
Slice.
Slice who?
Slice you a piece of cake—it’s your birthday! - Knock, knock.
Who’s there?
Balloon pop.
Balloon pop who?
Balloon pop and the party don’t stop! - Knock, knock.
Who’s there?
Candle.
Candle who?
Candle we sing “Happy Birthday” now? - Knock, knock.
Who’s there?
Ice cream.
Ice cream who?
Ice cream because I love birthdays! - Knock, knock.
Who’s there?
Confetti.
Confetti who?
Confetti your birthday wish came true! - Knock, knock.
Who’s there?
Surprise.
Surprise who?
Surprise party, just for you! - Knock, knock.
Who’s there?
Cheer.
Cheer who?
Cheer up, it’s your birthday!
Happy Birthday Knock Knock Jokes
- Knock, knock.
Who’s there?
Happy.
Happy who?
Happy birthday to you! - Knock, knock.
Who’s there?
Singing.
Singing who?
Singing you a birthday song! - Knock, knock.
Who’s there?
Joy.
Joy who?
Joy-ful wishes for your big day! - Knock, knock.
Who’s there?
Laugh.
Laugh who?
Laugh all day—it’s your birthday! - Knock, knock.
Who’s there?
Big.
Big who?
Big happy birthday hugs for you! - Knock, knock.
Who’s there?
Cake slice.
Cake slice who?
Cake slice be with you all day! - Knock, knock.
Who’s there?
Birthday wish.
Birthday wish who?
Birthday wish you many happy returns! - Knock, knock.
Who’s there?
Candlelight.
Candlelight who?
Candlelight up the room for your birthday glow! - Knock, knock.
Who’s there?
Cheers.
Cheers who?
Cheers to your birthday fun! - Knock, knock.
Who’s there?
Gift box.
Gift box who?
Gift box of happiness for your day!
40th Birthday Knock Knock Jokes
- Knock, knock.
Who’s there?
Forty.
Forty who?
Forty candles on your cake today! - Knock, knock.
Who’s there?
Over.
Over who?
Over the hill—but still young at heart! - Knock, knock.
Who’s there?
Oldie.
Oldie who?
Oldie but goldie at 40! - Knock, knock.
Who’s there?
Fabulous.
Fabulous who?
Fabulous 40 and thriving! - Knock, knock.
Who’s there?
Wine.
Wine who?
Wine not celebrate turning 40? - Knock, knock.
Who’s there?
Age.
Age who?
Age is just a number—40 is fun! - Knock, knock.
Who’s there?
Candle overload.
Candle overload who?
Candle overload on your 40th birthday cake! - Knock, knock.
Who’s there?
Vintage.
Vintage who?
Vintage 1985—you’re classic at 40! - Knock, knock.
Who’s there?
Forty fun.
Forty fun who?
Forty fun years and many more ahead! - Knock, knock.
Who’s there?
Celebrate.
Celebrate who?
Celebrate your fabulous 40 today!
50th Birthday Knock Knock Jokes
- Knock, knock.
Who’s there?
Fifty.
Fifty who?
Fifty candles, better get a fire extinguisher! - Knock, knock.
Who’s there?
Half.
Half who?
Half a century and still shining bright! - Knock, knock.
Who’s there?
Golden.
Golden who?
Golden years start at 50! - Knock, knock.
Who’s there?
Classic.
Classic who?
Classic at 50—you never go out of style! - Knock, knock.
Who’s there?
Wise.
Wise who?
Wise enough to enjoy turning 50! - Knock, knock.
Who’s there?
Fifty fun.
Fifty fun who?
Fifty fun memories and more to come! - Knock, knock.
Who’s there?
Silver.
Silver who?
Silver lining—you’re fabulous at 50! - Knock, knock.
Who’s there?
Age.
Age who?
Age gracefully—you’re only 50 once! - Knock, knock.
Who’s there?
Big five-oh.
Big five-oh who?
Big five-oh reasons to party today! - Knock, knock.
Who’s there?
Celebration.
Celebration who?
Celebration time for your golden 50th!
80th Birthday Knock Knock Jokes
- Knock, knock.
Who’s there?
Eighty.
Eighty who?
Eighty candles might light up the whole room! - Knock, knock.
Who’s there?
Wisdom.
Wisdom who?
Wisdom comes with 80 years of birthdays! - Knock, knock.
Who’s there?
Old but gold.
Old but gold who?
Old but gold at 80 and still shining! - Knock, knock.
Who’s there?
Vintage.
Vintage who?
Vintage 1945—you’re priceless at 80! - Knock, knock.
Who’s there?
Celebrate.
Celebrate who?
Celebrate eight wonderful decades! - Knock, knock.
Who’s there?
Classic.
Classic who?
Classic at 80—like fine wine! - Knock, knock.
Who’s there?
Story.
Story who?
Story of 80 years well lived! - Knock, knock.
Who’s there?
Candle count.
Candle count who?
Candle count might take all night at 80! - Knock, knock.
Who’s there?
Forever young.
Forever young who?
Forever young at heart—even at 80! - Knock, knock.
Who’s there?
Party.
Party who?
Party big—it’s your 80th birthday!
Funny Birthday Knock Knock Jokes
- Knock, knock.
Who’s there?
Ice cream.
Ice cream who?
Ice cream if I don’t get cake! - Knock, knock.
Who’s there?
Lettuce.
Lettuce who?
Lettuce eat cake already! - Knock, knock.
Who’s there?
Cow says.
Cow says who?
Cow says moo—but I say happy birthday! - Knock, knock.
Who’s there?
Boo.
Boo who?
Don’t cry—it’s just a birthday joke! - Knock, knock.
Who’s there?
Alpaca.
Alpaca who?
Alpaca the cake, let’s celebrate! - Knock, knock.
Who’s there?
Orange.
Orange who?
Orange you glad it’s your birthday? - Knock, knock.
Who’s there?
Donut.
Donut who?
Donut forget it’s your birthday today! - Knock, knock.
Who’s there?
Peas.
Peas who?
Peas have some cake with me! - Knock, knock.
Who’s there?
Cereal.
Cereal who?
Cereal-ously, happy birthday! - Knock, knock.
Who’s there?
Nacho.
Nacho who?
Nacho birthday—it’s theirs!
Short Knock Knock Birthday Jokes
- Knock, knock.
Who’s there?
Cake.
Cake who?
Cake for you! - Knock, knock.
Who’s there?
Wish.
Wish who?
Wish you happy birthday! - Knock, knock.
Who’s there?
Fun.
Fun who?
Fun times ahead—it’s your day! - Knock, knock.
Who’s there?
Candle.
Candle who?
Candle I sing happy birthday now? - Knock, knock.
Who’s there?
Party.
Party who?
Party all day—it’s your birthday! - Knock, knock.
Who’s there?
Cheer.
Cheer who?
Cheer up—it’s cake time! - Knock, knock.
Who’s there?
Smile.
Smile who?
Smile big, birthday star! - Knock, knock.
Who’s there?
Funfetti.
Funfetti who?
Funfetti cake for you! - Knock, knock.
Who’s there?
Yum.
Yum who?
Yum cake—let’s eat! - Knock, knock.
Who’s there?
Sing.
Sing who?
Sing happy birthday to you!
21st Birthday Knock Knock Jokes
- Knock, knock.
Who’s there?
Twenty-one.
Twenty-one who?
Twenty-one candles—time to celebrate big! - Knock, knock.
Who’s there?
Drink.
Drink who?
Drink up—it’s your 21st! - Knock, knock.
Who’s there?
Cheers.
Cheers who?
Cheers to freedom at 21! - Knock, knock.
Who’s there?
Party.
Party who?
Party hard—you’re 21 now! - Knock, knock.
Who’s there?
Key.
Key who?
Key to adulthood—it’s your 21st! - Knock, knock.
Who’s there?
Shot.
Shot who?
Shot glasses ready for your 21st! - Knock, knock.
Who’s there?
Fun.
Fun who?
Fun times start at 21! - Knock, knock.
Who’s there?
Freedom.
Freedom who?
Freedom to party—it’s your 21st! - Knock, knock.
Who’s there?
Wild.
Wild who?
Wild night ahead—21 looks good! - Knock, knock.
Who’s there?
Legal.
Legal who?
Legal fun begins—happy 21st!
60th Birthday Knock Knock Jokes
- Knock, knock.
Who’s there?
Sixty.
Sixty who?
Sixty candles—it’s your big day! - Knock, knock.
Who’s there?
Golden.
Golden who?
Golden years start at 60! - Knock, knock.
Who’s there?
Wise.
Wise who?
Wise at 60—like a fine book! - Knock, knock.
Who’s there?
Classic.
Classic who?
Classic and classy at 60! - Knock, knock.
Who’s there?
Birthday star.
Birthday star who?
Birthday star shining bright at 60! - Knock, knock.
Who’s there?
Candlelight.
Candlelight who?
Candlelight your cake with 60 flames! - Knock, knock.
Who’s there?
Party.
Party who?
Party like never before—it’s your 60th! - Knock, knock.
Who’s there?
Vintage.
Vintage who?
Vintage 1965—you’re priceless! - Knock, knock.
Who’s there?
Celebrate.
Celebrate who?
Celebrate six decades of awesomeness! - Knock, knock.
Who’s there?
Memory.
Memory who?
Memory lane at 60 is full of joy!