Situated in the southwest corner of the Indochina Peninsula, Cambodia has an area of 181,040 sq km (69,900 sq mi), extending 730 km (454 mi) NE-SW and 512 km (318 mi) SE-NW . It is bounded on the NE by Laos, on the E and SE by Vietnam, on the SW by the Gulf of Thailand, and on the W , NW, and N by Thailand, with a total boundary length of 2,572 km (1,598 mi). Comparatively, the area occupied by Cambodia is slightly smaller than the state of Oklahoma. In 1982, the PRK signed an agreement with Vietnam on their mutual maritime frontier. A treaty delineating the land border was signed in December 1985.
Cambodia's capital city, Phnom Penh, is located in the southcentral part of the country.