Lincoln Park Zoo is located just off Lake Shore Drive at the Fullerton Parkway exit, at 2200 N Cannon Drive. By car, just follow the 'Inner Drive' (Lake Shore Drive West) south to Cannon, continue south on Cannon past Fullerton and into the zoo parking lot.  The zoo is 1.4 miles south of the building, a 20-minute walk through Lincoln Park.  CTA bus routes 151 or 156 both serve the zoo.

http://www.lpzoo.com/info/plan_your_visit/location.html

http://www.lpzoo.com/index2.html

Lincoln Park Zoo: 312-742-2000
2200 N Cannon Dr, Chicago, IL 60614, US .

Here's a detailed mapquest from here to there  ...