Below is a list of Harlan IN zip codes. For your research we have also included Harlan Area Code, Time Zone, UTC and the local Allen County FIPS Code. Each Harlan Indiana zip code has a center Longitude / Latitude point (the Harlan center is -84.91960144043 / 41.196098327637). For your convenience we have also indicated if that zip code in Harlan observes Daylight Savings time.