Flagler is a Statutory Town in western Kit Carson County, Colorado, United States. The town population was 567 at the 2020 United States Census. Flagler is near Exit 395 on I-70. The town was established in 1888 as a small settlement near the then-new Rock Island Railroad. The area has had several names, and prior to the settlement of the town, …Flagler is a Statutory Town in western Kit Carson County, Colorado, United States. The town population was 567 at the 2020 United States Census. Flagler is near Exit 395 on I-70. The town was established in 1888 as a small settlement near the then-new Rock Island Railroad. The area has had several names, and prior to the settlement of the town, the location had been home to a combined general store and post office, owned by W.H. Lavington, and named Bowser in memory of the owner's favorite dog who had died. When the town was founded, the town was named Malowe after Rock Island Railroad attorney M. A. Lowe. The town was later renamed after Henry Flagler, railroad builder and oil man, at the request of his daughter who liked the area.