Dingzhou (China) is 3.8 times larger than Palmdale, California.
Area: 1,309 km2 calculated
Dingzhou is a county-level city in the southwest of Hebei province, People's Republic of China. Dingzhou is administered under Baoding City, about halfway between Baoding and Shijiazhuang and had population of 1,200,000 in 2009. Wikipedia
Area: 346 km2 calculated
Palmdale is a city located in the center of northern Los Angeles County, California, United States. Palmdale was the first community within the Antelope Valley to incorporate as a city on August 24, 1962; 47 years later, in November 2009, voters approved creating a charter city. Wikipedia