Hill Valley is a city in the United States of America whose location is unknown. As of 2025, Hill Valley has a resident population of 10. The city was founded in 2018 by Joe McGrath, who also the city’s current mayor.
Current Residents
| Name | Age | Race | Occupation |
| Joe McGrath | 27 | White | Mayor of Hill Valley (2018-Present) |
| Michael McGrath | 9 | White | Student |
| Sergey McGrath | 8 | White | Student |
| Sean McGrath | 68 | White | Snake Destroyer |
| Viktor Shevchenko | 9 | White | Homeschooled Student |
| Chang | 7 | Asian | Student |
| Jared Ypsilantis | 39 | White | Owner of OPA |
| King Hercules of Poppo | 7 (47 in Dog Years) | Yorkshire Terrier | King of Dogs |
| Hezekiah Williamson | 28 | Black | Wonder Bread Delivery Truck Driver |
| Gilbert Fitzgerald | 41 | White | Florida’s Ambassador to Hill Valley |