| 100% | ATTU | 4 | Alaskan site of the only WWII battle on U.S. soil |
| 90% | ATTU | 4 | Site of the only WWII battle on U.S. soil |
| 48% | PEARL | 5 | With 4 Down, site of the attack that on today's date in 1941 lead to the US entering WWII |
| 46% | OAHU | 4 | Site of the U.S.'s only royal palace |
| 44% | OAHU | 4 | Site of the only royal palace in the US |
| 42% | NORMANDY | 8 | Site of the battle that took place on D-Day |
| 41% | REAGAN | 6 | Only U.S. president with a star on the Hollywood Walk of Fame |
| 39% | WILLIAMSCOLLEGE | 15 | Site of the oldest U.S. observatory |
| 39% | NYC | 3 | Site of the U.N.'s HQ |
| 38% | VITKOV | 6 | Hill battle site on the outskirts of Prague |
| 37% | EGYPT | 5 | Site of the only remaining ancient Wonder |
| 37% | REAGAN | 6 | Only U.S. president with a star on the Hollywood Walk of Fame (probably because he made July National Ice Cream Month) |
| 37% | ARKANSAS | 8 | Home of the only active diamond mine in the U.S. |
| 36% | CHURCHROCK | 10 | Site of the largest radioactive spill in U.S. history |
| 36% | AMERICAFIRSTER | 14 | *Opponent of the U.S. entry into WWII |
| 36% | OAHU | 4 | Birthplace of the only U.S. president born outside the contiguous 48 states |
| 36% | STAR | 4 | One of the 50 on the U.S. flag |
| 35% | DADE | 4 | Second half of the U.S.'s only hyphenated county name |
| 35% | SANTACLARA | 10 | Site of the last battle of the Cuban Revolution |
| 35% | TAIL | 4 | Site of the 9-Across on an old nickel |
| 34% | NIXON | 5 | U.S. president who becomes the president of future Earth on "Futurama" |
| 34% | CASTILLON | 9 | Site of the final battle of the Hundred Years' War |
| 34% | ANTIETAM | 8 | Site of the bloodiest battle of the American Civil War |
| 34% | TORREY | 6 | San Diego's ___ Pines, site of the 2008 U.S. Open |
| 34% | FDR | 3 | Initials of the only four-term US president |
| 34% | TWOS | 4 | U.S. bills that depict the Declaration of Independence signing on their backs |
| 34% | SENLAC | 6 | — Hill, site of the Battle of Hastings in 1066 |
| 33% | LABORUNION | 10 | Ronald Reagan is the only U.S. president who was also president of a … |
| 33% | FORTKNOX | 8 | Army post in Kentucky; site of the US Bullion Depository |
| 33% | SAINTALBANS | 11 | Wars of the Roses battle site |