Below is a list of Algonquin IL zip codes. For your research we have also included Algonquin Area Code, Time Zone, UTC and the local Mchenry County FIPS Code. Each Algonquin Illinois zip code has a center Longitude / Latitude point (the Algonquin center is -88.33519744873 / 42.168399810791). For your convenience we have also indicated if that zip code in Algonquin observes Daylight Savings time.