The North-Central of Chicago is where about 19,404 people live in Gold Coast. This is also the home of Millenium Centre | 33 W Ontario. The average age Millenium Centre | 33 W Ontario of residents is around 42.0 years. To find Millenium Centre | 33 W Ontario on a map, look for zip code 60610. Real estate in this area retails on average $2,392,000 which comes down to about $609 /SqFt. The average family in Gold Coast consists of 2.3 members.