Where Is Area Code 773?
Area code 773 is found in the US state of Illinois. Primarily servicing the city of Harwood Heights (population: 23297), area code 773 covers 1 county of Illinois.
Located in the Central time zone, area code 773 is on the same time as Chicago, IL.
Area code 773 was brought into effect on October 12, 1996. 773 was split from the parent 312 area code.
Counties in Area Code 773
- Cook.
Most Populous Cities in Area Code 773
| City | County | City Population | Time Zone |
|---|---|---|---|
| Harwood Heights | Cook | 23,297 | CST |
| Lincolnwood | Cook | 12,678 | CST |
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.
This page was last updated on July 3, 2015.