Are people aware of who Naruto's parents are?
Most of them didn't know. It was a secret to protect Naruto. Just a few people knew it. I found proof on this site:


  Suddenly orphaned, Naruto was left to grow up knowing nothing of his parents, receiving only his mother's last name because the Third Hokage thought that it was best that nobody knew that he was related to the Fourth Hokage.


They found it here: Naruto chapter 440, page 5