Getting to Know Chicago

Chicago proper has about three million inhabitants living in an area about two-thirds the size of New York City; another five million make the suburbs their home. The Chicago River forms a Y that divides the city into its three geographic zones: North Side, South Side, and West Side (Lake Michigan is where the East Side would be). The downtown financial district is called the Loop. The city's key shopping street is North Michigan Avenue, also known as the Magnificent Mile. In addition to department stores and vertical malls, this stretch of property north of the river houses many of the city's most elegant hotels. North and south of this downtown zone, Chicago stretches along 29 miles of Lake Michigan shoreline that is, by and large, free of commercial development, reserved for public use as green space and parkland from one end of town to the other.

Finding an Address -- Chicago is laid out in a grid system, with the streets neatly lined up as if on a giant piece of graph paper. Because the city itself isn't rectangular (it's rather elongated), the shape is a bit irregular, but the perpendicular pattern remains. Easing movement through the city are a half-dozen or so major diagonal thoroughfares.

Point zero is located at the downtown intersection of State and Madison streets. State Street divides east and west addresses, and Madison Street divides north and south addresses. From here, Chicago's highly predictable addressing system begins. Making use of this grid, it's relatively easy to plot the distance in miles between any two points in the city.

Virtually all of Chicago's principal north-south and east-west arteries are spaced by increments of 400 in the addressing system -- regardless of the number of smaller streets nestled between them -- and each addition or subtraction of 400 numbers to an address is equivalent to a half-mile. Thus, starting at point zero on Madison Street and traveling north along State Street for 1 mile, you will come to 800 N. State St., which intersects Chicago Avenue. Continue uptown for another half-mile and you arrive at the 1200 block of North State Street at Division Street. And so it goes, right to the city line, with suburban Evanston located at the 7600 block north, 9 1/2 miles from point zero.

The same rule applies when you're traveling south, or east to west. Thus, heading west from State Street along Madison Street, Halsted Street -- at 800 W. Madison St. -- is a mile's distance, while Racine Avenue, at the 1200 block of West Madison Street, is 1 1/2 miles from the center. Madison Street then continues westward to Chicago's boundary with the nearby suburb of Oak Park along Austin Avenue, which, at 6000 W. Madison, is approximately 7 1/2 miles from point zero.

The key to understanding the grid is that the side of any square formed by the principal avenues (noted in dark or red ink on most maps) represents a distance of half a mile in any direction. Understanding how Chicago's grid system works is of particular importance to those visitors who want to do a lot of walking in the city's many neighborhoods and who want to plot in advance the distances involved in trekking from one locale to another.

The other convenient aspect of the grid is that every major road uses the same numerical system. In other words, the cross street (Division St.) at 1200 N. Lake Shore Dr. is the same as at 1200 N. Clark St. and 1200 N. LaSalle St.

Street Maps -- Maps are available at the city's visitor information centers at the Chicago Cultural Center and the Chicago Water Works Visitor Center. You can also print out maps from the Chicago Convention and Tourism Bureau website, www.choosechicago.com.