Watkins is an unincorporated town and a census-designated place located in and governed by Arapahoe and Adams counties, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The census-designated place borders Aurora, and the Watkins post office, which lies within the Aurora city limits, has the ZIP Code 80137. At the United States Census 2020, the population of the Watkins CDP was 682.