O'Hare is one of the 77 community areas of Chicago in Illinois, United States, located on the far north side of Chicago. Chicago O'Hare International Airport is located within the boundaries of this community area. This community area is the only one that extends outside Cook County; the western edge (an area comprising the southwest part of the airport) is in DuPage County.

The area is a transportation hub containing O'Hare International Airport as well as major roads such as Interstate 90, its auxiliary Interstate 190, Interstate 294, Illinois Route 72, Illinois Route 171, U.S. Route 12 and U.S. Route 45. This allows the O'Hare neighborhood, combined with the nearby suburb of Rosemont, to work as an edge city.

In the Second Treaty of Prairie du Chien, Alexander Robinson was given two square miles of land in what is now the O'Hare community area as a reward for shielding white settlers during Battle of Fort Dearborn. The land was slowly settled over the remainder of the nineteenth century despite the opening of a railroad depot in 1887. During World War II, the Douglas Aircraft Company produced cargo planes in the area. After the war, the facility became a commercial airport that the City of Chicago eventually developed into O'Hare International Airport. In response to the annexation, the University of Chicago revised its map of official community areas to add O'Hare as the 76th area. It is one of only two revisions to occur since the late 1920s.

According to an analysis by the Chicago Metropolitan Agency for Planning, the area had 14,394 residents comprising 6,652 households as of June 2024. The racial makeup of the area was 61.9% white, 6.1% African American, 14.4% Asian American and 6.1% were either American Indian, Alaska Native, Native Hawaiian-Pacific Islander or some other race. Hispanic or Latino residents of any race were 11.4% of the population.

20.6% were under the age of 20 years, 22.5% were age 20 years to age 34 years, 26.4% were age 35 years to age 49 years, 16.5% were age 50 years to age 64 years and 14% were 65 years or older.

The median household income was $83,116 compared to a median income of $77,902 for Chicago at-large. The area had an Income distribution in which 11.4% of households earned less than $25,000 annually; 16.9% of households earned between $25,000 and $49,999; 18% of households earned between $50,000 and $74,999; 11.5% of households earned between $75,000 and $99,999; 24.4% of households earned between $100,000 and $149,999 and 17.9% of households earned more than $150,000.

The corporate headquarters of Bally Total Fitness, Independent Grocers Alliance, Lafarge North America, True Value and U.S. Cellular are located in the O'Hare area. The Consulate-General of the Dominican Republic, which is responsible for facilitating trade between the Dominican Republic and the United States is located at 8700 West Bryn Mawr Avenue. Nippon Cargo Airlines and Suzlon Energy have their American headquarters in the O'Hare community area. O'Hare was home to the headquarters of Wilson Sporting Goods until 2016, when the company chose to move to One Prudential Plaza.

The top five employing industry sectors in O'Hare are transportation (59.2%), accommodation and food (7.6%), professional (6.3%), administration (4.7%), and information (4.6%). 68.5% of these workers come from outside of Chicago. The top five employing industry sectors of community residents are healthcare (11.5%), retail trade (9.9%), manufacturing (8.7%), transportation (8.4%), and administration (8.2%)