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Winthrop Harbor, Illinois facts for kids

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Winthrop Harbor
Cornerstone of Illinois
Location of Winthrop Harbor in Lake County, Illinois.
Location of Winthrop Harbor in Lake County, Illinois.
Location of Illinois in the United States
Location of Illinois in the United States
Country United States
State Illinois
County Lake
 • Total 4.80 sq mi (12.43 km2)
 • Land 4.64 sq mi (12.01 km2)
 • Water 0.16 sq mi (0.42 km2)
 • Total 6,705
 • Density 1,446.29/sq mi (558.36/km2)
Time zone UTC-6 (CST)
 • Summer (DST) UTC-5 (CDT)
ZIP Code(s)
Area code(s) 847/224
FIPS code 17-82686

Winthrop Harbor is a village in Lake County, Illinois, United States. Winthrop Harbor is considered the corner stone of Illinois. The population was 6,742 at the 2010 census. It is located along the northern border of Illinois and is part of the Chicago metropolitan area. Winthrop Harbor is known for its North Point Marina, and is a warning demarcation point for the National Weather Service's marine warnings for Lake Michigan. With moorage over 1,500 boats, it is the largest marina on the Great Lakes. Nearly one million visitors take advantage of the marina, its associated beaches and other recreational facilities every summer.


Winthrop Harbor was named after Winthrop, Massachusetts.


According to the 2010 census, Winthrop Harbor has a total area of 4.761 square miles (12.33 km2), of which 4.67 square miles (12.10 km2) (or 98.09%) is land and 0.091 square miles (0.24 km2) (or 1.91%) is water.


Historical population
Census Pop.
1910 439
1920 473 7.7%
1930 661 39.7%
1940 785 18.8%
1950 1,765 124.8%
1960 3,848 118.0%
1970 4,794 24.6%
1980 5,427 13.2%
1990 6,240 15.0%
2000 6,670 6.9%
2010 6,742 1.1%
2020 6,705 −0.5%
U.S. Decennial Census

As of the 2010 United States Census, there were 6,742 people living in the village. The racial makeup of the village was 90.94% White, 1.44% Black or African American, 2.31% Asian, 0.39% Native American, 0.01% Pacific Islander, 2.03% of some other race and 2.88% of two or more races. 7.64% were Hispanic or Latino (of any race).

As of the census of 2000, there were 6,670 people, 2,370 households, and 1,884 families living in the village. The population density was 1,548.0 people per square mile (597.5/km2). There were 2,435 housing units at an average density of 565.1 per square mile (218.1/km2). The racial makeup of the village was 93.79% White, 0.57% African American, 0.49% Native American, 1.90% Asian, 0.01% Pacific Islander, 1.51% from other races, and 1.71% from two or more races. Hispanic or Latino of any race were 4.54% of the population.

There were 2,370 households, out of which 40.1% had children under the age of 18 living with them, 66.8% were married couples living together, 8.4% had a female householder with no husband present, and 20.5% were non-families. 17.0% of all households were made up of individuals, and 5.1% had someone living alone who was 65 years of age or older. The average household size was 2.81 and the average family size was 3.17.

In the village, the population was spread out, with 27.4% under the age of 18, 8.1% from 18 to 24, 31.2% from 25 to 44, 25.2% from 45 to 64, and 8.1% who were 65 years of age or older. The median age was 36 years. For every 100 females, there were 100.4 males. For every 100 females age 18 and over, there were 97.8 males.

The median income for a household in the village was $72,795, and the median income for a family was $79,442. Males had a median income of $44,795 versus $32,392 for females. The per capita income for the village was $24,256. About 1.9% of families and 3.1% of the population were below the poverty line, including 3.1% of those under age 18 and 4.2% of those age 65 or over.


Major streets

  • Illinois 137.svg Sheridan Road
  • 9th Street
  • Lewis Avenue
  • Russell Road
  • Kenosha Road
  • 7th Street


Winthrop Harbor is served by Metra's Union Pacific / North Line, at Winthrop Harbor Metra station.

Pollution concerns

  • In a study released on July 30, 2009 by, Winthrop Harbor's North Point Marina was reported as the seventh most polluted beach in the United States based on samples taken in 2008. North Point Marina has been on this list since 2005, exceeding acceptable contamination levels in 61 percent of tests.
  • In 2006, a test taken at the local beach stated that this is one of the most polluted beaches on the Great Lakes. It has 89% unhealthy water. (89/100 tests)
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