phone number: fax number: emergency response program: 928-428-0110: 928-428-8074: public health: 928-428-0110: 928-428-8074
Springfield, Illinois. Springfield is the capital of the U.S. state of Illinois and the county seat of Sangamon County. The city's population of 116,250 as of the 2010 U.S. Census makes it the state's sixth most populous city. It is the largest city in central Illinois.
Springfield was formed as a township on April 14, 1794, from portions of Elizabeth Township and Newark Township, while the area was still part of Essex County, and was incorporated as one of New Jersey's first 104 townships by an act of the New Jersey Legislature on February 21, 1798.