Not me, but most of my close friends were single at 30. We are all 38/39 now.
Of my four best friends:
Friend A met a guy at 33, had a baby with him at 36, theyre happily together and expecting DC2.
Friend B met a guy at 33, married at 35, had a few fertility problems bit after successful IVF had a baby at 37.
Friend C met a guy at 31, moved in and got engaged quite quickly. It went wrong after 2 years. She met another guy at 35, had a baby at 36. Theyre now separated but she is a happy, working, successful single mother.
Friend D met a guy at 32, married at 34, she has just had her third baby at 39.
If it makes you feel any better, I was married and expecting my second baby at 30...but I clearly recall my 30th birthday year. All my single friends went on a holiday to Cuba and were sending me pictures of their fabulous adventures in Havana, while I was at home, pregnant, bored and a bit miserable. They also progressed much better in their careers - all four of them - than I have. Having kids in my twenties really fucked my career for quite a while.