Anchorage, Alaska is 6.4 times larger than Singapore.
Area: 697 km2 World Factbook
Population: 5,567,301 (July 2014) World Factbook
Singapore, officially the Republic of Singapore, is a sovereign city-state and island country in Southeast Asia. It lies off the southern tip of the Malay Peninsula and is 137 kilometres north of the equator. Wikipedia
Area: 4,476 km2 calculated
Anchorage is a unified home rule municipality in the southcentral part of the U.S. state of Alaska. It is the northernmost city in the United States with more than 100,000 residents and the largest community in North America north of the 60th parallel. Wikipedia