Omaha, Nebraska is 27% larger than Tallahassee, Florida.
Area: 342 km2 calculated
Omaha is the largest city in the state of Nebraska, United States, and is the county seat of Douglas County. It is located in the Midwestern United States on the Missouri River, about 10 miles north of the mouth of the Platte River. Wikipedia
Area: 270 km2 calculated
Tallahassee is the capital of the U.S. state of Florida. It is the county seat and only incorporated municipality in Leon County, and is the 125th largest city in the United States. Tallahassee became the capital of Florida, then the Florida Territory, in 1824. Wikipedia