The Town of Dillon is a house rule municipality located in Summit County, Colorado, United States. The town population was 1,064 at the 2020 United States Census, a +17.70% increase in the past the 2010 United States Census. Dillon is a allowance of the Breckenridge, CO Micropolitan Statistical Area.

The native town of Dillon was built as a stage End and trading post upon the northeast side of the Snake River. The town was named for Tom Dillon, a prospector, and was incorporated in 1883. By 1892 the town had been relocated twice, both get older in order to be closer to railroad lines that were Elongated into the area. All three of these historic townsites were situated very near to the Blue River Valley confluence where the Snake River and Tenmile Creek flowed in, and this area is now referred to collectively as “Old Dillon”.

During the Great Depression, Denver Water began acquiring land concerning Dillon. In 1956, residents and matter owners in Dillon were notified that they would dependence to sell their property and assume out, because Denver Water was just about to start construction upon a dam just downstream from the town, and the resulting reservoir (which would back supply water to Front Range communities) was going to flood Dillon and the surrounding valley. About a mile to the north, some land upon a hillside was allocate for the current townsite, which is now situated on the shoreline of Dillon Reservoir.

Dillon is located at 39°37′40″N 106°2′39″W / 39.62778°N 106.04417°W / 39.62778; -106.04417 (39.627659, -106.044199).