Cortland township is located in DeKalb County Illinois. Cortland township has a 2024 population of 11,377. Cortland township is currently growing at a rate of 0.43% annually and its population has increased by 1.69% since the most recent census, which recorded a population of 11,188 in 2020.
The average household income in Cortland township is $104,166 with a poverty rate of 5.14%. The median age in Cortland township is 35.7 years: 34.1 years for males, and 37.2 years for females.
According to the most recent ACS, the racial composition of Cortland township was:
White
Black or African American
Two or more races
Asian
Other race
Native American
Native Hawaiian or Pacific Islander
Household Type | Count | Average Size | Owner | Renter |
|---|---|---|---|---|
| All | 4,137 | 2.71 | 80 | 20 |
| Married | 2,209 | 3.24 | 94.9 | 5.1 |
| Non Family | 1,262 | 1.35 | 57.7 | 42.3 |
| Female | 407 | 3.06 | 73.7 | 26.3 |
| Male | 259 | 4.27 | 71.8 | 28.2 |
3.13
Average Family Size
2.71
Average Household Size
80.0%
Rate of Home Ownership
Married
Male
Female
NonFamily
owner
renter
Male
Female
Less Than 9th Grade
9th to 12th Grade
High School Graduate
Some College
Associates Degree
Bachelors Degree
Graduate Degree
High School Graduation Rate
Bachelors Rate
The highest rate of high school graduation is among asian people with a rate of 100%.
The highest rate of bachelors degrees is among asian people with a rate of 100%.
All
Male
Female
$51,061
Average Earnings
$58,665
Average Male
$36,542
Average Female
Only English
Spanish
Other Indo-European Languages
Asian and Pacific Island Languages
Other Languages
91.45% of Cortland township residents speak only English, while 8.55% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 7.13% of the population.
rate
5.14%
Overall Poverty Rate
5.81%
Male Poverty Rate
4.47%
Female Poverty Rate
The race most likely to be in poverty in Cortland township is Black, with 14.38% below the poverty level.
The race least likely to be in poverty in Cortland township is White, with 5.15% below the poverty level.
The poverty rate among those that worked full-time for the past 12 months was 0.05%. Among those working part-time, it was 8.42%, and for those that did not work, the poverty rate was 8.23%.
Married
Widowed
Divorced
Separated
NeverMarried
49.6%
Overall Marriage Rate
51.2%
Male Marriage Rate
48.2%
Female Marriage Rate
male
female
The age group where males are most likely to be married is 55-64, while the female age group most likely to be married is 55-64.
Married
Widowed
Divorced
Separated
NeverMarried
Less Than 9th Grade
High School Graduate
Some College
Bachelors or Greater
11.52%
Veteran Poverty Rate
35.02%
Veteran Disability Rate
LaborForceParticipation
72.4%
Labor Force Participation
69.6%
Employment Rate
3.9%
Unemployment Rate
LaborForceParticipation
LaborForceParticipation
Europe
Asia
Africa
Oceania
Latin America
North America
Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.
Europe
Asia
Africa
Oceania
Latin America
North America
79.62%
Born in Cortland township
96.54%
Native Born
3.46%
Foreign Born
1.91%
Non Citizen
1.55%
Naturalized
96.54% of Cortland township residents were born in the United States, with 79.62% having been born in Illinois. 1.91% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Latin America.
Year | Population | Growth | Growth Rate |
|---|---|---|---|
| 2029 | 11,622 | 49 | 0.42% |
| 2028 | 11,573 | 49 | 0.43% |
| 2027 | 11,524 | 49 | 0.43% |
| 2026 | 11,475 | 49 | 0.43% |
| 2025 | 11,426 | 49 | 0.43% |
| 2024 | 11,377 | 49 | 0.43% |
| 2023 | 11,328 | 49 | 0.43% |
| 2022 | 11,279 | 27 | 0.24% |
| 2021 | 11,252 | 64 | 0.57% |
| 2020 | 11,188 | -240 | -2.1% |
| 2019 | 11,428 | 119 | 1.05% |
| 2018 | 11,309 | 81 | 0.72% |
| 2017 | 11,228 | 63 | 0.56% |
| 2016 | 11,165 | 42 | 0.38% |
| 2015 | 11,123 | 0 | 0% |
| 2014 | 11,123 | 82 | 0.74% |
| 2013 | 11,041 | 24 | 0.22% |
| 2012 | 11,017 | 51 | 0.47% |
| 2011 | 10,966 | -38 | -0.35% |
| 2010 | 11,004 | 0 | 0% |