There are 13 US Post Offices in Tazewell County serving a total of 130,688 residents equating to 10,053 residents per post office. It's estimated that approximately 208,593 packages are handled across the 13 county post offices annually. Tazewell County(/t\u00e6zw\u025bl/)(TazzWell) is a county located in the U.S. state of Illinois. According to the 2010 census, it had a population of 135,394. Its county seat and largest city is Pekin. It is pronounced with a short \"a\", to rhyme with \"razz\" rather than \"raze\". Tazewell County is part of the Peoria, IL Metropolitan Statistical Area. The majority of the population live along the western border of the county."