Edgewood is a city in Clayton and Delaware counties in the U.S. state of Iowa. Highway 3, which runs through the center of town, is the dividing line between the two counties. The Edgewood post office was established in 1852 on the Clayton side of the town. Edgewood was formally incorporated in 1892, although it had a functioning council for some time before that date. The population was 909 at the time of the 2020 census, down from 923 in 2000.