Looking for heartfelt things to say to your cousin on their birthday? Discover thoughtful birthday wishes and messages designed to make your cousin feel special on their big day. Whether your cousin is your close friend or you want to reconnect, we offer a variety of messages to fit every relationship—funny, sincere, and sentimental. Brighten their celebration with unique greetings tailored to cousins of all ages. Get inspired with creative ideas for texts, cards, or social media posts, ensuring your cousin receives warm birthday cheer that strengthens your family bond.