Area code 202 was brought into effect on January 1, 1947.
Counties in Area Code 202
- District of Columbia.
Most Populous Cities in Area Code 202
|City||County||City Population||Time Zone|
|Washington||District of Columbia||631,800||EST|
Note: The above list is based off of the top 25 most populous cities in the area code as per 2012 United States Census Bureau estimates.
View all United States Area Codes.