Great question! You can find out in the following ways:
Check your voter registration card
Look at your property tax bill
Click HERE to see the official map

* This map outlines Barrington Township in red.

For Cook County, click HERE to check registration status, voting locations, and more! Don't live in Cook County? No problem! Head over to Vote.org and check your voter registration nationwide. 

Click HERE if you live in Illinois, type in your address, and see your ballot!