From the record
“The North State Street Historic District is a nationally designated historic district in Monticello, Piatt County, Illinois. The residential district is centered on State Street north of downtown Monticello; it includes 77 buildings, 56 of which are considered contributing to its historic character.”
Wikipedia article North State Street Historic District, CC BY-SA 4.0.
One of 6 National Register listings published here for Piatt County · listed in 1998 · category: District.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service



