Paul Cornell (August 5, 1822–March 3, 1904) was an American lawyer and Chicago real estate speculator who founded the Hyde Park Township that included most of what are now known as the south and far southeast sides of Chicago in Cook County, Illinois, United States. He turned the south side Lake Michigan lakefront area, especially the Hyde Park community area and neighboring Kenwood and Woodlawn neighborhoods, into a resort community that had its heyday from the 1850s through the early 20th century. He was also an urban planner who paved the way for and preserved many of the parks that are now in the Chicago Park District. Additionally, he was a successful entrepreneur with interests in manufacturing, cemeteries, and hotels.
His modern legacy includes several large parks now in the Chicago Park District: Jackson Park, Washington Park, Midway Plaisance and Harold Washington Park. Most of the South and Southeast Sides of Chicago were developed and eventually annexed into the City of Chicago as a result of his foresight.