Lincoln, Nebraska is 36% larger than Sioux Falls, South Dakota.
Area: 230 km2 calculated
Lincoln is the capital and the second-most populous city of the State of Nebraska, after Omaha. Lincoln is also the county seat of Lancaster County and the home of the University of Nebraska. Lincoln's population in 2013 was estimated at 268,738. Wikipedia
Area: 170 km2 calculated
Sioux Falls is the largest city in the U.S. state of South Dakota. It is the county seat of Minnehaha County, and also extends into Lincoln County to the south. Wikipedia