Below is a list of Mill Creek IN zip codes. For your research we have also included Mill Creek Area Code, Time Zone, UTC and the local La Porte County FIPS Code. Each Mill Creek Indiana zip code has a center Longitude / Latitude point (the Mill Creek center is -86.549003601074 / 41.5964012146). For your convenience we have also indicated if that zip code in Mill Creek observes Daylight Savings time.