Allen, Illinois
Allen: township in LaSalle County, Illinois
About
Allen is a township located in the county of Mason in the U.S. state of Illinois. Its population at the 2010 census was 584 and a population density of 16 people per km². After 10 years in 2020 city had an estimated population of 536 inhabitants.
Quick Facts about Allen
| Population | 536 (2020) |
| Country | United States of America |
| State | Illinois (United States) |
| County | Mason County |
| Area | 36.23 km2 |
| Latitude & Longitude | 40.3050,-89.6496 |
| Altitude | 692 feet / 211 meters |
| Time Zone | America/Chicago |
| Local time | 23:57:14 (22nd April 2026) |
| Density | 15 Pop. per km² as of 2020 |
| Population growth | -8.96% (2010-2020) |
| Weather | 77℉ Mostly Sunny 7-days weather |
Geography
Allen is located at 40°18'18"N 89°38'58"W (40.3050400, -89.6495500).
Allen map
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Weather
Mostly sunny, with a high near 77. Southwest wind around 9 mph, with gusts as high as 20 mph.
7-Day ForecastDemographics
According to census records, the population of Allen decreased by 8.96% in 10 years.
| Year | Population | % Change | Method |
|---|---|---|---|
| 2010 | 584 | - | census |
| 2011 | 578 | -1.04% | estimation process |
| 2012 | 572 | -1.05% | estimation process |
| 2013 | 567 | -0.88% | estimation process |
| 2014 | 563 | -0.71% | estimation process |
| 2015 | 558 | -0.9% | estimation process |
| 2016 | 553 | -0.9% | estimation process |
| 2017 | 550 | -0.55% | estimation process |
| 2018 | 547 | -0.55% | estimation process |
| 2019 | 541 | -1.11% | estimation process |
| 2020 | 536 | -0.93% | estimation process |
Nearby Schools and Colleges
Schools and campuses linked to Allen, IL. Select a name to open its map and contact details.
| Code | Name | City | ZIP |
|---|---|---|---|
| 146676 | Lincoln College | Lincoln (IL) | 62656 |
Nearby Transit Stations (9)
Rail and bus stations connected to Allen, IL. Select a station to open its map and address details.
| Code | Name | Address | Type |
|---|---|---|---|
| LCN | Lincoln | Broadway and North Chicago Sts. | RAIL |
| PIA | Peoria, Illinois | 6100 West Everett M. Dirksen Parkway | BUS |
| SPI | Springfield station | East Washington and North Third Sts. | RAIL |
| BNL | Uptown Station | 100 East Parkinson St. | RAIL |
| MAC | Macomb | 120 East Calhoun Street | RAIL |
Closest post offices linked to Allen.
| Post Office Name | City | ZIP |
|---|---|---|
| San J Post Office | San Jose (IL) | 62682 |
Other places with the same name (8)
- Allen, Texas The fifth most populous city in Collin County, Texas. with a population of 109,379 people.
- Allen, Pennsylvania township in Northampton County, Pennsylvania, United States of America with a population of 5,092 people.
- Allen, Oklahoma town in Oklahoma, USA with a population of 930 people.
- Allen, Indiana unincorporated community in Indiana, United States with a population of 666 people.
- Allen, Nebraska city in Dixon County, Nebraska, United States of America with a population of 346 people.
- Allen, Michigan village in Hillsdale County in the U. with a population of 192 people.
- Allen, Kansas human settlement in Lyon County, Kansas, United States of America with a population of 169 people.
- Allen, South Dakota census-designated place in Bennett County, South Dakota with a population of 88 people.
Other cities in Mason County
Cities, towns, neighborhoods & other populated places in Mason County , IL.
| City Name | Population | Title |
|---|---|---|
| Havana | 2,945 | City in Mason County, Illinois, United States |
| Mason City | 2,088 | Township in Mason County, Illinois |
| Manito | 1,467 | Human settlement in Illinois, United States of America |
| San Jose | 587 | Village in Logan and Mason counties, Illinois, United States |
| Bath | 306 | Human settlement in United States of America |
| Easton | 283 | Human settlement in Illinois, United States of America |
| Kilbourne | 271 | Township in Mason County, Illinois |
| Forest City | 249 | Township in Mason County, Illinois |
| Bishop | 121 | Unincorporated community in Illinois |
| Topeka | 69 | Town in Mason County, Illinois, United States |