Below is a list of Willoughby Hills OH zip codes. For your research we have also included Willoughby Hills Area Code, Time Zone, UTC and the local Lake County FIPS Code. Each Willoughby Hills Ohio zip code has a center Longitude / Latitude point (the Willoughby Hills center is -81.418403625488 / 41.637199401855). For your convenience we have also indicated if that zip code in Willoughby Hills observes Daylight Savings time.