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is a city in Lake County, Indiana, United States. Whiting is located on the southern shore of Lake Michigan and is nicknamed the "Little City on the Lake". It is about 16 miles from the Chicago Loop and just short of two miles from Chicago's South Side. Whiting is also home to the largest oil refinery in the Midwest. The population was 5,137 at the 2000 census.
According to the United States Census Bureau, the city has a total area of 3.3 square miles (8.5 km²), of which, 1.8 square miles (4.6 km²) of it is land and 1.5 square miles (3.9 km²) of it (46.34%) is water.
The Whiting post office (46394) serves not only the City of Whiting, but also the adjacent Hammond neighborhood of Robertsdale, immediately to the west. Addresses in this Hammond neighborhood show “Whiting, Indiana.” While not legally a part of the City of Whiting, locally the area has long been informally considered to be a culturally integrated part of Whiting. References to Whiting businesses or residents often include those technically from Hammond’s Robertsdale.