Are you looking for 55th birthday wishes for sister? I’ve got some ideas to inspire you. Here are over a dozen birthday quotes along with many more, written especially for your sister.

Happy 55th Birthday Wishes For Sister

1. Dear sister, I wanted to wish you a happy 55th birthday. I want to tell you how proud I am of the woman you have become. When I think of you, I always see a smile on my face, and nothing makes me happier than seeing good things happen to people who deserve them.
2. Wow, if I had to guess what your theme song was I would have said “just go ahead and turn the clock back another year.” Yeah, yeah. You don’t look a day over 50. and to think you have been around longer then us kids! Happy 55th sis, we love you and hope you have the best birthday ever!
3. Happy 55th birthday! I am so glad that we are sisters! Your kindness and generosity is amazing. You’re a wonderful sister, auntie and friend. I wish you a wonderful year, full of joy and love.
4. My dear sister, you are my best friend. You are always there for me when I need you. Even though we may not always agree, deep down I know that we love each other. Wishing you all the joy and happiness this wonderful world has to offer on your 55th birthday!
5. Dearest older sister, I’ve been with you for almost half a century now, and I couldn’t be more grateful for the sister I got. Our lives have been filled with drama, laughter, joy and pain. From childhood to adulthood they filled us with experiences we could hardly imagine. Hopefully as my last birthday wish, you could always be happy and healthy till the end of your days. Happy 55th birthday!
6. Happy 55th Birthday, dear sister! I wish you to spend each day being happy, healthy and enjoying every moment of your precious life!
7. You are the best! I can’t imagine my life with you not in it. EVERYTHING about having a sister is great. You are one of the funniest, loudest and most caring people I know. I love you and forever will!! Happy 55th birthday!!
8. Dear sis, I hope your 55th birthday is a great one. I just wanted to thank you for being such a good friend, and for always helping me when I need it. If I had a sister, I would want it to be you!
9. You’re my little sister and I am so proud of you. I always knew you were going to do great things. You’re the best sister a person could have and all I want is for the best. I feel blessed having you around. Happy 55th birthday!
10. There is no one in this world that could ever replace you. You have always been there for me and I am so thankful to have a sister like you. I truly am the luckiest sister in the world! Happy 55th birthday!
11. 55 years of life, filled with adventure and prosperity! Your positive outlook will get you through life’s hardest challenges. You are never made to feel bad about anything. No matter what the situation is you lift it up a notch above. You are no quitter, and you won’t even give up on your wildest dreams! Happy 55th birthday!
12. Today is your 55th birthday and I want to take a few minutes to tell you how much you mean to me. You have been my best friend since we were little kids and you have always been there for me. I wouldn’t be the person I am today if it weren’t for you! Thank you for everything! Happy Birthday the BEST sister in the world!
13. Sis, it’s hard to believe that you are 55 years old. You are a beautiful mature lady. You’re still pretty as ever. I hope you will have a great party. If everything goes well, we can celebrate your birthday together and many more! Wish you the best!
14. Sis, I am still amazed by you. You are one of the strongest, most amazing women I know, mother, wife and sister. I wish I could buy you the world for your 55th birthday but instead all I can do is love you and hope that makes up for my lack of presents.
15. When I think of you, my mind immediately travels to so many wonderful memories we’ve shared over the years. There’s not only been laughter and good times but also tears and heartache when I didn’t believe things would get better. Thank you for being the sister that you are! Happy 55th birthday
16. Sis, it’s been so long since we’ve spent quality time together. I think it’s about time we start planning the next shopping trip! I love spending time with you and catching up on stories from our childhood. 55th years has flown by quickly but you are still my little sister.
17. There isn’t a day that goes by that I don’t think of you. You are my sister, my friend and my mentor! I couldn’t ask for a better big sister. You are the kindest, most loving person I know; you teach me how important relationships and family are in so many ways. It’s your birthday today and I want to wish you the happiest of birthdays and hope it’s filled with joy, love and laughter. Happy 55th birthday!
18. Sister, I don’t even know where to begin, this is so hard. You have been through so much in your 55 years on Earth that it just doesn’t seem fair!  I’m so happy and grateful to have a sister like you who has had my back through all the good times and all the tough times too. You are one of the bravest people I know, and I wouldn’t be the person I am today if it were not you. Happy 55th birthday!
19. Sister, you’re the most important person in my life. I’m proud of your accomplishments and I’m thankful for our friendship. I’m especially grateful you were there for me when it mattered most. My heartfelt thanks for your love and support Sister. Happy 55th birthday!
20. Dear Sister, It’s hard to believe it’s been a whole decade now since I moved away. I was so scared and didn’t know what to do. But now I can’t imagine my life without you in it. I now love where I live and work and have completely fallen in love with the city… Happy 55th birthday!
21. Sis, I hope your day is filled with laughter, joy, and some tears of happiness. You have been through a lot these last few months, but you need to keep smiling. You are my best friend and I love you. Happy 55th birthday!
22. Happy 55th birthday! Sis is my best friend. She knows me better than anyone else and I wouldn’t change a thing about that. I love her more and more with each passing day, thanks for being the woman you are!
23. I am so proud to be your sister and that we can share this life together. Happy birthday to the best sister in the world! We have shared so much together, loving memories that we’ll never forget. I wish you a very happy 55th birthday sis!
24. Dear sis, growing up I always looked up to you as a role model and big sister. Now that I am getting older I am even more in awe of you and admire who you have made yourself into, especially through the years. It is truly an honor knowing that we share the same birthday. You are an inspiration to all that know you and I am proud to call you my big sister. Happy 55th Birthday!
25. Wonderful, Magical, Gorgeous, Sweet and Amazing. Such a big milestone for my beautiful sister. I want to give you the best special day that anyone can ask for. You deserve it! I love you so much with all my heart and I want the world to give you lots of special hugs and kisses today! Happy 55th birthday!
26. Hey sis! I wish your happy 55th birthday and hope you continue to get everything you wished for.
27. I’ve wanted to spend my birthday with you for so long! Thank you for giving me the opportunity to share this day with you. You’re so special to me in every way, and I couldn’t imagine spending it with anyone else. I love you so much. You are my role model and my best friend, and I will forever cherish our friendship. Happy 55th birthday!
28. Happy 55th birthday! I will never forget that you always stood by my side. You’re the best sister a guy could ever have. I love you, sis!
29. You are my best friend and sister. I love that you have been there with me through thick and thin. You always have my back and I will always have your back. We have been through a lot together, but we still laugh to this day at some of the funny things we have done. Happy 55th birthday!
30. Happy 55th birthday! We may have grown up and now live many miles from each other, but even so I can’t help taking a walk down memory lane every once in a while and thinking of the good old days. I know it may sound silly to say, but I miss you so much! And if you are ever able to visit me somewhere or if I am ever able to visit you, be sure that I will never leave your side at any moment! You are still my big sis after all!
31. Happy 55th birthday! You’re the best sister in the world! I feel so lucky to have someone who loves me so much. You’ve been a great friend forever and I hope that you know that I am always here for you.
32. We’ve been friends since we were kids, never ever hostile, with nothing to hide and no regrets. I think my friendship must be a wonderful thing. Happy 55th birthday!
33. Through all these years you have been the best. I look up to you and think of you as a second mother. It’s completely normal that I come to you with any problems or worries. When I fell in love with your son, I knew he was a winner, and our relationship has confirmed it. For your 55th birthday, a toast to many more birthdays.
34. Dear Sister, you are special, unique and one of a kind. Everyone loves you for what you are because your outside is just so beautiful and innocent looking; but on the inside we see a feisty and funny lady who has been through hardships that are unspoken. Happy 55th Birthday!
35. Happy 55th birthday to my sister! We go back a long way, and I hope the next 55 years bring you as much happiness as your last. I love you, sis!
36. Happy 55th birthday to my sister! You mean the world to me! You’re my sister, a friend, and one of my heroes. This world would be a better place if we had more people like you in it. You have always been there for me and I love you with all my heart. I love seeing you smile everyday because your happiness is contagious! Enjoy your special day filled with love!
37. Happy 55th Birthday to my big sister! I am always so proud to call you mine. You’ve been there for me through everything and I don’t know what I would do without you. From the clothes you shared when I was a kid, to the love and support during my divorce, my heart is full because of you. Love you bunches!
38. Today is your big day. Sis, I want to thank you for being there through the good times and the bad. You are one of a kind and I am lucky to have you as my sister. Happy 55th birthday!
39. Sis, we’ve known each other so long I can’t even imagine life without you. You are one of the strongest women I know! Enjoy your day celebrating how far you have come. HAPPY 55TH BIRTHDAY!
40. HAPPY 55TH BIRTHDAY SIS!! I can’t tell you how wonderful it is to see you grow into such an amazing woman. I know you will stay strong for many more years. You have accomplished so much and I am so proud of you! You mean the world to me!