Australian Capital Territory (Australia) is 9.8 times larger than Surprise, Arizona.
Australian Capital Territory is a territory in the south east of Australia, enclaved within New South Wales. It is the smaller of the two self-governing internal territories in Australia. The only city and by far the most populous community is Canberra, the capital city of Australia. Wikipedia
Area: 239 km2 calculated
Surprise is a city in Maricopa County, Arizona, USA. The population was 30,848 at the 2000 census; however, rapid growth has boosted the city's population to 117,517 at the 2010 census, an increase of 281%. Wikipedia