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  • Short and Sweet Birthday Wishes for Your Sister or Sister-in-Law
  • Meaningful Birthday Wishes for Your Sister or Sister-in-Law
  • Birthday Blessings for Your Sister or Sister-in-Law
  • Funny Birthday Wishes for Your Sister or Sister-in-Law

It’s one of the most important dates in your calendar: Your sister’s birthday. No matter if it's a milestone birthday this year or she's simply celebrating another trip around the sun; it's always a special day worthy of recognition. Whether you grew up together or met later in life, sisters share a unique bond. There's no better way to honor your sibling on her birthday than with one of these heartwarming birthday messages for sisters to help ring in her personal new year.

This list of the best birthday wishes for your sister or sister-in-law has all the inspiration you need to let her know how much she means to you. Does your sister get a kick out of witty quips, or is she more on the sentimental side? No matter her personality type, the birthday wishes from this robust roundup will make her feel acknowledged and loved.

Attach one of these messages to a thoughtful gift, send it as a text, or write it inside a birthday card to make your sister’s day even more special. And if she’s active on social media, be sure to share these birthday wishes as Instagram captions or on TikTok with your favorite sibling photos or video.

As your sister turns one year old (and wiser), these funny, heartwarming, and delightful birthday greetings will live in her heart for years to come.

For more birthday message inspiration, check out our birthday wishes for best friends and birthday Bible verses for friends and family.

Short and Sweet Birthday Wishes for Your Sister or Sister-in-Law

short and sweet birthday wishes for your sister or sister in law
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  • I love you today, tomorrow, and forever. Happy birthday, sister!
  • Happy birthday, sister! I love you!
  • Today we celebrate you. Happy birthday!
  • Happy birthday to my first best friend.
  • Time to party! Happy birthday, sister.
  • Sisters are the greatest gift. Happy birthday!
  • I can’t wait to celebrate your special day. I love you, sister!
  • Cheers to another year around the sun!
  • Happy cake day! Enjoy.
  • You’re the best sister anyone could ever ask for. HBD!
  • Wishing you the best birthday yet!
  • Happy birthday to my partner in crime. Happy birthday, sissy!
  • Happy birthday, dear sister. You’re the best!
  • Happy birthday to my favorite (and only) sister!
  • Live it up, sister. Happy birthday!
  • I’m the luckiest person on earth to have a sister like you. Happy birthday!
  • You’re one-of-a-kind and I love you so much. Happy birthday, sister!
  • Wishing the most wonderful sister the best birthday ever!
  • Happy birthday to the girl who always makes me smile.
  • Happy birthday to my first and forever friend!

Meaningful Birthday Wishes for Your Sister or Sister-in-Law

meaningful birthday wishes for your sister or sister in law
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  • Sisters are one of life's greatest gifts. I’m so grateful you're mine. Happy birthday!
  • Since the day you were born, I knew you were special. You continue to prove me right. Happy birthday, sister!
  • Happy birthday to the person who has always been my protector even though I’m the older sister!
  • Thank you for being a shoulder I can always lean on no matter what. I love you so much. Happy birthday!
  • You’ve always been my biggest supporter. Wishing you the absolute best birthday, sister!
  • We may not have known each other our entire lives, but it sure feels like it. Happy birthday, sister-in-law!
  • You’re one of the best parts of my life and I’m so proud to call you my sister. Wishing you a wonderful birthday.
  • Happy birthday to my most beloved confidante. Thank you for being you. Happy birthday, big sister.
  • You’re one of my biggest inspirations. Wishing you the best on your personal new year!
  • As I look back on our lives, you’ve always been my biggest cheerleader. Today, we celebrate you. Happy birthday!
  • Thank you for being such an awesome role model for me when we were growing up. I still look up to you. Happy birthday, sister.
  • You’re such a wonderful addition to our family. Wishing you the happiest of birthdays!
  • No matter what I’m going through, you always know how to make me feel better. I appreciate you more than you’ll ever know. I love you, sister. Happy birthday!
  • I look back fondly on my childhood and you’re such a major part of it. Thank you for being the best sister ever. Happy birthday!
  • Our sibling bond is something that outsiders will never understand. I’m lucky to have such a loving sister. Happy birthday!
  • I can always count on you to lift me when I’m low and encourage me to keep going at my heights. Thank you for being you. Happy birthday, sister.
  • No one can make me laugh the way you do. Today, I hope to bring a smile to your face. Happy birthday!
  • You’re one of my favorite people on the planet. Never stop being the amazing person that you are, little sister. Happy birthday!
  • Happy birthday to the person responsible for helping shape me into the woman I am today. I love you, sister!
  • Thank you for always being by my side. Wishing you a wonderful birthday!
  • No sibling rivalry over here — it’s only pure love. Happy birthday!
  • I’m beyond grateful to call you my sister and most importantly, my friend. Happy birthday.
  • When you came into our family, you fit right in. Keep bringing joy to all those around you. Happy birthday, sister-in-law!
  • When you blow out your candles, I hope that all your wishes and dreams come true. Happy birthday, sissy!
  • When times are good and when they are bad, you’ll always be the best sister I could ever have. Happy birthday!
  • Happy birthday to the girl who always knows how to make me see the glass half full. I admire your optimism. Happy birthday, sister.
  • Your smile always lights up every room. Keep shining. Happy birthday!
  • No one can make me laugh the way that you do. Your sense of humor is one of a kind and I love you for it. Happy birthday to my hilarious sister!
  • Today we celebrate the wonderful woman who makes us all smile. Happy birthday!
  • When we were growing up, I always thought you were the prettiest and most fabulous person I knew. That still rings true. Happy birthday, sister.

Birthday Blessings for Your Sister or Sister-in-Law

birthday blessings for your sister or sister in law
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  • Having a built-in best friend is one of my biggest blessings. Happy birthday to my all-time bestie.
  • When I think about the wonderful people in my life, you’re the first to come to mind. Happy birthday to my beloved sister.
  • May God grant all of your heart’s desires today and always. Happy birthday!
  • God blessed me when he made us siblings. Wishing you a splendid birthday!
  • When you were born, I knew God sent us all an angel. I still feel the same way. Happy birthday, little sister.
  • When you joined our family, I knew you would become one of our biggest blessings. Happy birthday, sister-in-law!
  • Your birthday will always be one of my favorite days. That’s because it was the day my best friend was born. Happy birthday!
  • May God continue to cover you on your special day and beyond. Wishing you a fantastic birthday.
  • Having an unbreakable sibling bond like ours is one of life’s biggest blessings. I never take our closeness for granted. Happy birthday, sister.
  • I’m convinced that God blessed me with the absolute best sister on the planet. Happy birthday!
  • Every day I thank the Lord for allowing someone as special as you to be a big part of my life. Birthday blessings to you, sister.
  • My prayer is that you get everything you want and more. You deserve it all. Happy birthday!
  • As you turn another year older, I know that God will continue to bless you. Keep the faith and enjoy your special day.
  • May your birthday be filled with endless blessings!
  • Always keep God first in all that you do. Happy birthday, sister.
  • I’m forever grateful to God for making us siblings. Having you as a sister is the greatest blessing I could’ve ever received. Wishing you a wonderful birthday.
  • Friends may come and go, but siblings are forever. I’m so blessed to have you as my sister. Happy birthday!
  • May the Lord’s blessings shower over you today and always. Enjoy your birthday!
  • Today we celebrate one of God’s greatest creations: you! Happy birthday, sister.
  • As you make another journey around the sun, remember to count your blessings. Happy birthday!
  • I will always praise God for making us siblings. I know our bond is unique and I never take it for granted. Happy birthday, sister.
  • Wishing you a blessed birthday. Enjoy, big sister!
  • I’m always praying for you, sister. Today and every day, I wish you nothing but joy. Happy birthday!
  • God continues to show me that unconditional love exists. You’re proof. Happy birthday!
  • When the universe made us siblings, it was one of my biggest blessings! Happy birthday.
  • Keep being the loving, caring and kind person you are and watch your blessings continue to flow. Happy birthday!
  • Wishing the best sister endless blessings today and always. Happy birthday!
  • Sisters like you are the greatest blessings. I’ll always thank God for choosing me to be your sibling. Happy birthday!
  • As long as you lean on God, you’ll always be guided. Wishing you countless blessings on your special day.
  • Happy birthday to one of God’s greatest gifts!

Funny Birthday Wishes for Your Sister or Sister-in-Law

funny birthday wishes for your sister or sister in law
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  • I’m pretty sure I’m the favorite child, but since it’s your special day, I’ll let you think otherwise. Happy birthday, sister!
  • You’re the ketchup to my mustard. Happy birthday, sister!
  • Let’s party like it’s your birthday! Oh wait, it really is. HBD!
  • Don’t get too cake wasted. Happy birthday!
  • Happy birthday to my former womb mate!
  • Happy birthday, sister. Don’t you worry about getting so old. That was something that happened years ago.
  • Mom and dad did a good job raising you. I’m shocked you’ve turned out so well. Happy birthday!
  • Happy birthday, sister. Enjoy another 365 days of an all-expenses paid trip around the sun!
  • Even though you always thought you were mom and dad’s favorite, we all know the truth. Happy birthday, sis!
  • I guess your birthday wish came true because you have me as a sibling! Happy birthday, sissy.
  • Every year you get more beautiful. Even wrinkles look good on you. Happy birthday, sister!
  • Don’t forget who’s the older sibling. You know who’s boss! Happy birthday!
  • We may need to call the fire department with all those candles on the cake! Enjoy your special day, old lady!
  • I brought you the best birthday gift ever: me! Happy birthday, sister.
  • Wishing the most intelligent person I know a great day. That’s me. And to you a very happy birthday.
  • Thanks for always being older than me. Happy birthday, sister!
  • I’m looking forward to growing old with you, and happy that you have a head start. Happy birthday!
  • Yesterday is past, tomorrow is unknown, and the present… I didn’t get you one. Happy birthday anyway!
  • With another year passing, I hope you start acting your age and not your shoe size. Happy birthday, sister!
  • Happy birthday to the girl who thinks she’s God’s gift to this family. OK, you’re one of our many blessings, but not the main one. Happy birthday!
Headshot of Karla Pope
Karla Pope

Karla Pope is a longtime writer, editor and blogger with nearly two decades of editorial experience. She’s written for a variety of outlets including Good Housekeeping, Woman’s Day, People, Parade, BET.com. WebMD and more. Her coverage includes entertainment, beauty, lifestyle, parenting and fashion content. If she's not exploring New York City with her two young children, you can find her curled up on the couch watching a documentary and eating gummy bears.