East St. Louis is a city located in St. Clair County, Illinois, USA, directly across the Mississippi River from St. Louis, Missouri. As of the 2000 census, the city had a total population of 31,542. One of the highlights of the city's waterfront is the Gateway Geyser, the world's tallest fountain, which spews water to a height of 600 feet and is designed to mirror the Gateway Arch across the river in St. Louis. East St. Louis is located at 38°36'56" North, 90°7'40" West (38.615550, -90.127825)GR1. According to the United States Census Bureau, the city has a total area of 37.4 km² (14.4 mi²). 36.4 km² (14.1 mi²) of it is land and 1.0 km² (0.4 mi²) of it is water. The total area is 2.56% water. East St. Louis usually experiences cold winters and warm summers. On July 14, 1954 the temperature at East Saint Louis unexpectedly rose to 117°F (48°C), the highest temperature ever recorded in Illinois.

As of the censusGR2 of 2000, there were 31,542 people, 11,178 households, and 7,668 families residing in the city. The population density is 866.2/km² (2,242.9/mi²). There are 12,899 housing units at an average density of 354.2/km² (917.2/mi²). The racial makeup of the city is 1.23% White, 97.74% African American, 0.19% Native American, 0.08% Asian, 0.03% Pacific Islander, 0.19% from other races, and 0.55% from two or more races. 0.73% of the population are Hispanic or Latino of any race.