Piatt County, Illinois

Piatt County: County in Illinois, United States

About

Piatt County is a county located in the U.S. state of Illinois. As of the 2010 census, the population was 16,729 and a population density of 15 people per km². After 10 years in 2020 county had an estimated population of 16,355 inhabitants. Its county seat is Monticello. The county was created 182 years ago in 1840.

Quick Facts about Piatt County

Population : 16,355 (2020)
Country : United States of America
State : Illinois (United States)
Area : 1140 km2
Water as percent of area : 0.06%
Land as percent of area : 99.94%
Named for : James A. Piatt
Altitude : 689 feet / 210 meters
Capital : Monticello
Establishment : January 01, 1841
Time Zone : America/Chicago
Local time : 08:52:09 (5th February 2023)
Density : 14 Pop. per km² as of 2020
Population growth : -2.29% (2010-2020)
Piatt County locator map
Location of Piatt County on Illinois map.
Piatt County Illinois Courthouse image
Piatt County Illinois Courthouse
Piatt County Illinois Courthouse image

Geography

Piatt County is located at 40°0'37"N 88°35'28"W (40.0103700, -88.5910900). It has 4 neighbors: Douglas County, Moultrie County, Champaign County and De Witt County.

Piatt County map

The largest city of Piatt County is Monticello with a population of 5,557. Other cities include, Bement population 1,661, Blue Ridge population 1,416, Cerro Gordo population 1,337 and Mansfield population 939. See all Piatt County cities & populated places.

Piatt County Populated Places

Cities, Towns, Neighborhoods & Other Populated Places in Piatt County.

City Name Population Title
Monticello 5,557 City in Piatt County, Illinois, United States
Bement 1,661 City in Illinois, United States of America
Blue Ridge 1,416 Unincorporated community in Illinois
Cerro Gordo 1,337 Human settlement in Illinois, United States of America
Mansfield 939 Human settlement in Illinois, United States of America
Hammond 478 Village in Illinois
De Land 423 Village in Piatt County, Illinois, United States
Cisco 242 Village in Piatt County, Illinois, United States

Piatt County has 4 neighbours.

Demographics

According to census records, the population of Piatt County decreased by 2.29% in 10 years.

Year Population % Change Method
2010 16,729 - census
2011 16,679 -0.3% estimation process
2012 16,501 -1.08% estimation process
2013 16,429 -0.44% estimation process
2014 16,409 -0.12% estimation process
2015 16,350 -0.36% estimation process
2016 16,524 1.05% estimation process
2017 16,422 -0.62% estimation process
2018 16,366 -0.34% estimation process
2019 16,344 -0.13% estimation process
2020 16,355 0.07% estimation process

Comitatul Piatt, Comte de Piatt, Comté de Piatt, Condado de Piatt, Condado han Piatt, Contea di Piatt, Hrabstwo Piatt, Okrug Pajat, Pajatt, Pajut, Piatt, Piatt Comitatus, Piatt Kun, Piatt Kūn, Piatt konderria, Piatt megye, Quan Piatt, Quận Piatt, mqatʿt bayat, pi ya te xian, piatto jun, piyata ka'unti, Округ Пајат, Пайатт, Пайът, Піатт, Փլաթ շրջան, מחוז פיאט, مقاطعة بايات, پائیٹ کاؤنٹی، الینوائے, پیاٹ کاؤنٹی, পিয়াট কাউন্টি, ピアット郡, 皮亞特縣

People born in Piatt County (1)

Emeritus Professor and Emeritus Curator of Insects at the Museum of Zoology of the University of Michigan in Ann Arbor, Michigan, USA Richard D. Alexander was born in Piatt County

Illinois Other Counties (more counties)

County Name Population Title
Cook County 5,108,284 County in Illinois, United States
Chicago 2,677,643 City and county seat of Cook County, Illinois, United States
DuPage County 917,481 County in Illinois, United States
Lake County 693,593 County in Oregon, United States
Will County 688,726 County in Illinois, United States
Kane County 531,010 County in southern Utah, United States
Markham 328,966 City in Cook County, Illinois, United States
McHenry County 305,888 County in Illinois, United States
Winnebago County 281,295 County in Illinois, United States
Madison County 262,635 County in Montana, United States
Saint Clair County 258,046 The County of St.
Champaign County 209,192 County in Illinois, United States
Aurora 196,383 City in Kane County, Illinois, United States
Sangamon County 193,882 County in Illinois, United States
Peoria County 177,652 County in Illinois, United States of America
McLean County 171,256 County in North Dakota, United States