The deceased Potter has no link to the young wizard created by author J.K. Rowling.
"There is no connection with the Harry Potter we know from literature, but the name sells, the name is marketable," said Ron Peled, a tour guide who said he has brought dozens of groups to the grave.
Officials said people started asking about Potter's tombstone about five years ago. Tourists come just to take photos of it.
The second-to-last Harry Potter movie, "Harry Potter and the Deathly Hallows: Part 1," opens Friday.
The Associated Press Contributed to this report.