McAllen, Texas is 9.1% larger than Provo, Utah.
Area: 125 km2 calculated
McAllen is the twenty-second most populous city in Texas and the largest city in Hidalgo County, Texas. It is located at the southern tip of Texas in the Rio Grande Valley, and is part of the Southern United States. Wikipedia
Area: 114 km2 calculated
Provo is the third-largest city in the U.S. state of Utah, located about 43 miles south of Salt Lake City along the Wasatch Front. Provo is the largest city and county seat of Utah County. It lies between the cities of Orem to the north and Springville to the south. Wikipedia