Cortland, IL
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Age
| Under 5 Years | 562 |
| 5 to 9 Years | 467 |
| 10 to 14 Years | 267 |
| 15 to 19 Years | 294 |
| 20 to 24 Years | 322 |
| 25 to 34 Years | 975 |
| 35 to 44 Years | 694 |
| 45 to 54 Years | 373 |
| 55 to 59 Years | 142 |
| 60 to 64 Years | 90 |
| 65 to 74 Years | 53 |
| 75 to 84 Years | 41 |
| 85 Years and Over | 0 |
| Median Age (in years) | 27.4 |
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Ancestry
| American | 32 | 0.6% |
| Arab | 0 | 0.0% |
| Czech | 80 | 1.6% |
| Danish | 86 | 1.7% |
| Dutch | 9 | 0.2% |
| English | 224 | 4.5% |
| French (except Basque) | 126 | 2.5% |
| French Canadian | 22 | 0.4% |
| German | 1,996 | 40.2% |
| Greek | 0 | 0.0% |
| Hungarian | 0 | 0.0% |
| Irish | 915 | 18.4% |
| Italian | 367 | 7.4% |
| Lithuanian | 0 | 0.0% |
| Norwegian | 198 | 4.0% |
| Polish | 434 | 8.7% |
| Portuguese | 41 | 0.8% |
| Russian | 0 | 0.0% |
| Scotch-Irish | 0 | 0.0% |
| Scottish | 51 | 1.0% |
| Slovak | 0 | 0.0% |
| Subsaharan Africa | 43 | 0.9% |
| Swedish | 285 | 5.7% |
| Swiss | 14 | 0.3% |
| Ukrainian | 12 | 0.2% |
| Welsh | 33 | 0.7% |
| West Indian (excluding Hispanic Origin Groups) | 0 | 0.0% |
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Education
| Less than 9th Grade | 79 | 3.3% |
| 9th to 12th grade, No Diploma | 124 | 5.2% |
| High School Graduate (includes equivalency) | 664 | 28.0% |
| Some College, No Degree | 720 | 30.4% |
| Associates Degree | 231 | 9.8% |
| Bachelor's Degree | 445 | 18.8% |
| Graduate or Professional Degree | 105 | 4.4% |
| Population 25 years and Over | 2,368 | |
| High School Graduate or Higher | 91.42& | |
| Bachelor's Degree or Higher | 23.22& |
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Gender
| Male | 2,140 | 50.00% |
| Female | 2,140 | 50.00% |
| Total Population | 4,280 |
Household Type
| Total Households | 1,271 | |
| Family Households | 978 | 76.94& |
| with own children under 18 years | 671 | 52.79% |
Household Occupation
| Occupied Housing Units | 1,271 | |
| Owner-Occupied | 973 | 76.55% |
| Renter Occupied | 298 | 23.44& |
Household Gross Rent
| Median (dollars) | $1,061 |
Household Selected Monthly Owner Costs
| Housing Units with a Mortgage | 820 |
| Median (dollars) | $1,842 |
| Housing Units Without a Mortgage | 153 |
| Median (dollars) | $668 |
Household Value
| Median (dollars) | $164,400 |
| Median (dollars) | $171,200 |
| Median (dollars) | $126,100 |
| Median (dollars) | $171,800 |
Income & Benefits (in 2012 Inflation-Adjusted Dollars)
| Median Household Income (dollars) | $70,764 |
| Median Household Income (dollars) | $39,412 |
| Median Household Income (dollars) | $51,964 |
| Median Household Income (dollars) | $54,773 |
Industry
| Agriculture, Forestry, Fishing, Hunting, and Mining | 73 | 3.42% |
| Arts, Entertainment, Recreation, Accommodation and Food Services | 184 | 8.63% |
| Construction | 129 | 6.05% |
| Educational Services, Health Care, and Social Assistance | 385 | 18.06% |
| Finance & Insurance, and Real Estate and Rental and Leasing | 174 | 8.16% |
| Information | 35 | 1.64% |
| Manufacturing | 197 | 9.24% |
| Other Services, Except Public Administration | 141 | 6.61% |
| Professional, Scientific, and Management, and Administrative and Waste Management Services | 207 | 9.71% |
| Public Administration | 111 | 5.21% |
| Retail Trade | 214 | 10.04% |
| Transportation, Warehousing, and Utilities | 159 | 7.46% |
| Wholesale Trade | 123 | 5.77% |
| Civilian Employed Population 16 Years and over | 2,132 |
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Land
| Area (in square miles) | 3.63 |
| Density (in square feet) | 1,179.06 |
Political Leaders
| President | Barack Obama |
| U.S. Senate | Richard Durbin |
| U.S. Senate | Mark Kirk |
| U.S. House of Representatives | Randy Hultgren |
| Illinois Senate | Dave Syverson |
| Illinois House of Representatives | Richard Pritchard |
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Race
| Hispanic or Latino (of any race) | 551 |
| Cuban | 0 |
| Mexican | 372 |
| Other Hispanic or Lation | 158 |
| Puerto Rican | 21 |
| Total Population | 551 |
| Not Hispanic or Latino | 3,729 |
| American Indian and Alaska Native Alone | 0 |
| Asian Alone | 35 |
| Black or African American Alone | 141 |
| Native Hawaiian and Other Pacific Islander Alone | 0 |
| Some Other Race Alone | 0 |
| Two or More Races | 205 |
| Two or More Races including Some Other Race | 0 |
| Two Races Excluding Some Other Race, and Three or More Races | 205 |
| White Alone | 3,348 |
| Total Population | 4,280 |
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Schools
| Elementary Schools | |
| Secondary Schools | |
| Unified School Districts | DeKalb Community Unit School Dist. 428 |
| Unified School Districts | Kaneland Community Unit School Dist. 302 |
| Unified School Districts | Sycamore Community Unit School Dist. 427 |
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Weather
| January | |
| Avg. High | 28 |
| Avg. Low | 13 |
| Mean | 21 |
| Avg. Precipitation | 1.48 |
| February | |
| Avg. High | 33 |
| Avg. Low | 17 |
| Mean | 25 |
| Avg. Precipitation | 1.61 |
| March | |
| Avg. High | 45 |
| Avg. Low | 27 |
| Mean | 36 |
| Avg. Precipitation | 2.27 |
| April | |
| Avg. High | 59 |
| Avg. Low | 38 |
| Mean | 49 |
| Avg. Precipitation | 3.27 |
| May | |
| Avg. High | 70 |
| Avg. Low | 49 |
| Mean | 60 |
| Avg. Precipitation | 4.57 |
| June | |
| Avg. High | 80 |
| Avg. Low | 59 |
| Mean | 70 |
| Avg. Precipitation | 4.14 |
| July | |
| Avg. High | 83 |
| Avg. Low | 63 |
| Mean | 73 |
| Avg. Precipitation | 4.37 |
| August | |
| Avg. High | 81 |
| Avg. Low | 61 |
| Mean | 71 |
| Avg. Precipitation | 4.36 |
| September | |
| Avg. High | 75 |
| Avg. Low | 52 |
| Mean | 64 |
| Avg. Precipitation | 3.25 |
| October | |
| Avg. High | 62 |
| Avg. Low | 40 |
| Mean | 51 |
| Avg. Precipitation | 2.88 |
| November | |
| Avg. High | 47 |
| Avg. Low | 30 |
| Mean | 39 |
| Avg. Precipitation | 2.7 |
| December | |
| Avg. High | 32 |
| Avg. Low | 17 |
| Mean | 25 |
| Avg. Precipitation | 2.15 |