Cortland township, Illinois
Cortland township profile, demographic data, and geographic information.
Cortland township is a geographic entity located in DeKalb County, Illinois. As of official census estimates, it has a reported population of 11,644. The land area covers 35.03 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population (2025 PEP Estimate) | 11,644 | — | 2025 / Census |
| Median Age | 35.1 yrs | ±2.4 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 4,106 | ±190 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 4,233 | ±211 |
| Occupied Housing Units | 4,106 | ±190 |
| Vacant Housing Units | 127 | ±77 |
| Median Home Value | $263,500 | ±$11,457 |
| Median Gross Rent | $1,444 | ±$153 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $99,292 | ±$10,637 |
| Per Capita Income | $41,197 | ±$2,827 |
| Poverty Rate | 6% | ±2.9% |
| Population Below Poverty Level | 680 | ±323 |
| Unemployment Rate | 5.1% | ±2.5% |
| Civilian Labor Force, Employed | 5,957 | ±331 |
| Broadband Internet Rate | 95.2% | ±2% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
TOWNSHIP OF CORTLAND
GUS Population: 11,483 (2024)
ID: 125146
|
Township | Official Local Government |
Contact: SUPERVISOR
14 S PRAIRIE ST, CORTLAND IL 60112-4065
|
|
GUS Population: 101,335 (2024)
ID: 124840
|
County | Official County Government |
Contact: COUNTY ADMINISTRATOR
200 N MAIN ST, SYCAMORE IL 60178-1431
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Cortland | KG-05 | Cortland, IL | |
| Alternative School Nearby | 09-12 | Burlington, IL | |
| Regular School Nearby | KG-05 | Saint Charles, IL | |
| Alternative School Nearby | 12 | Dekalb, IL | |
| Regular School Nearby | KG-05 | Hampshire, IL | |
| Regular School Nearby | KG-12 | Pingree Grove, IL | |
| Regular School Nearby | 09-12 | Burilngton, IL | |
| Regular School Nearby | 08 | Burlington, IL | |
| Regular School Nearby | 06-08 | DeKalb, IL | |
| 4 Nearby | 3-13 | SYCAMORE, IL |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 10 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Hair Professionals Career College
|
College Vocational | 3.4 mi away | 2245 Gateway Drive, Sycamore, IL, 60178 |
8157563596
|
|
CORTLAND COMMUNITY LIBRARY
|
Library | 1.7 mi away | 63 SOUTH SOMONAUK ROAD, CORTLAND, IL, 60112 |
(815) 756-7274
|
|
Debutantes School of Cosmetology and Nail Technology
|
College Vocational | 4.6 mi away | 145 N. 3rd Street, Dekalb, IL, 60115-3301 |
8157584045
|
|
MAPLE PARK PUBLIC LIBRARY DISTRICT
|
Library | 3.8 mi away | 302 WILLOW STREET, MAPLE PARK, IL, 60151 |
(815) 827-3362
|
|
Northern Illinois University
|
College | 5.4 mi away | 1425 W. Lincoln Hwy., Dekalb, IL, 60115-2828 |
8008923050
|
|
SYCAMORE PUBLIC LIBRARY
|
Library | 3.9 mi away | 103 EAST STATE STREET, SYCAMORE, IL, 60178 |
(815) 895-2500
|
|
Kishwaukee College
|
College | 11.3 mi away | 21193 Malta Rd, Malta, IL, 60150-9699 |
8158252086
|
|
DEKALB PUBLIC LIBRARY
|
Library | 4.5 mi away | 309 OAK STREET, DEKALB, IL, 60115 |
(815) 756-9568
|
|
Waubonsee Community College
|
College | 14.2 mi away | Rte 47 at Waubonsee Drive, Sugar Grove, IL, 60554-9454 |
6304667900
|
|
KANEVILLE PUBLIC LIBRARY DISTRICT
|
Library | 10.0 mi away | 2S101 HARTER ROAD, KANEVILLE, IL, 60144 |
(630) 557-2441
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at DE KALB, IL US, located 5.9 miles from Cortland township. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 28.1° | 13.1° | 20.6° | 1.69" | 10.2" |
| February | 32.5° | 16.6° | 24.5° | 1.71" | 8.7" |
| March | 45.0° | 26.8° | 35.9° | 2.24" | 4.4" |
| April | 58.6° | 37.3° | 48.0° | 3.56" | 1.3" |
| May | 70.2° | 49.2° | 59.7° | 4.79" | 0.0" |
| June | 79.9° | 59.5° | 69.7° | 4.57" | 0.0" |
| July | 83.1° | 63.3° | 73.2° | 4.00" | 0.0" |
| August | 81.2° | 61.3° | 71.3° | 4.06" | 0.0" |
| September | 74.9° | 53.2° | 64.0° | 3.32" | 0.0" |
| October | 62.0° | 41.0° | 51.5° | 2.96" | 0.1" |
| November | 46.3° | 29.6° | 37.9° | 2.31" | 1.8" |
| December | 33.6° | 19.1° | 26.3° | 2.04" | 6.6" |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| Cortland town | Town | 1.4 mi | — |
| Maple Park village | Village | 3.3 mi | — |
| Sycamore city | City | 4.3 mi | — |
| DeKalb city | City | 4.4 mi | — |
| Virgil village | Village | 7.0 mi | — |
| Burlington village | Village | 9.4 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 1703716483. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.