Lake County, Illinois

Lake County is a located in the  of. A 2006 census estimated the population was 713,076. Its is. According to the 2000 United States Census, Lake County is the 31st richest county by per-capita income. The county is part of the. Its lakefront communities, along with some in Cook County, are part of an area known as the.

Originally part of, the townships comprising Lake County were carved out into a separate county in 1839.

Geography
According to the, the county has a total area of 3,543 (1,368 ). 1,159 km² (448 sq mi) of it is land and 2,384 km² (920 sq mi) of it is water, much of it in. The total area is 67.28% water.

Adjacent counties

 * - north
 * - northeast1
 * - east1
 * - southeast1
 * - south
 * - west

1 Boundary lies entirely in Lake Michigan.

Demographics
As of the of 2000, there were 644,356 people, 216,297 households, and 163,953 families residing in the county. The was 556/km² (1,440/sq mi). There were 225,919 housing units at an average density of 195/km² (505/sq mi). The racial makeup of the county was 80.11%, 6.94% or , 0.28% , 3.90% , 0.05% , 6.72% from , and 2.01% from two or more races. 14.39% of the population were or  of any race.

The Census estimates 0f 2005 showed Lake County with 68.6% of its residents being non-Hispanic whites, 18.2% Latinos, 6.8% African American and 5.5% Asian.

According to the 2000 census there were 216,297 households out of which 42.10% had children under the age of 18 living with them, 63.20% were living together, 9.20% had a female householder with no husband present, and 24.20% were non-families. 19.70% of all households were made up of individuals and 6.20% had someone living alone who was 65 years of age or older. The average household size was 2.88 and the average family size was 3.33.

In the county the population was spread out with 29.40% under the age of 18, 8.90% from 18 to 24, 31.60% from 25 to 44, 21.60% from 45 to 64, and 8.50% who were 65 years of age or older. The median age was 34 years. For every 100 females there were 101.20 males. For every 100 females age 18 and over, there were 99.30 males. Waukegan and North Chicago account for 20% of the county's population.

The median income for a household in the county was $66,973, and the median income for a family was $76,424. Males had a median income of $50,789 versus $33,458 for females. The for the county was $32,102. About 4.00% of families and 5.70% of the population were below the, including 7.00% of those under age 18 and 4.80% of those age 65 or over. The 2000 Census reported that Lake County had the second median highest household income of any county in the state, behind.