The North-Central of Chicago is where about 16,478 people live in Loop. This is also the home of 400 E Randolph. The average age 400 E Randolph of residents is around 38.0 years. To find 400 E Randolph on a map, look for zip code 60601. Real estate in this area retails on average $6,767 which comes down to about N/A /SqFt. The average family in Loop consists of 2.3 members.