Wow, this was an easy blog post to write.
I suppose a longer answer would be more satisfying.
I have no idea how old you, the reader, are but that's irrelevant. No, you are not too old to learn programming. If you wonder if you are too old to become a professional software developer and are under the age of 50, the answer is still no. (And even above that age, the answer is merely "probably".)
But you might feel too old, or at least feel forever crippled because you didn't start coding the instant you developed fine motor skills. But I still assure you: You are not too old to learn programming.