Honolulu is on the island of Oʻahu in the state of Hawaii. It is located along the southeast coast of Oʻahu, which is the third-largest and most populated island in the Hawaiian Islands chain. Oʻahu is also home to other well-known places such as Waikīkī, Pearl Harbor, and Diamond Head. Honolulu serves as the capital city of Hawaii and is the major business, finance, hospitality, and military center of the state.