| Douglas Zip Code, Colorado - USA | |||
| CASTLE ROCK | 80104 | 39.374779 | -104.849988 |
| FRANKTOWN | 80116 | 39.30403 | -104.756722 |
| LARKSPUR | 80118 | 39.213354 | -104.950189 |
| LITTLETON | 80124 | 39.529639 | -104.906562 |
| LITTLETON | 80125 | 39.495327 | -105.05897 |
| LITTLETON | 80126 | 39.54372 | -104.969143 |
| LITTLETON | 80163 | 39.347863 | -104.994708 |
| LOUVIERS | 80131 | 39.347863 | -104.994708 |
| PARKER | 80134 | 39.489472 | -104.844731 |
| PARKER | 80138 | 39.510214 | -104.721607 |
| SEDALIA | 80135 | 39.311334 | -105.067554 |
Both Thomas Jefferson and John Adams passed away on July 4, 1826, 50 years after the Declaration of Independence was signed.