New-vehicle registrations in Hawaii jumped 23 percent in the third quarter from the year-earlier quarter, reflecting an improving economy.

The Hawaii Auto Outlook report, prepared for the Hawaii Automobile Dealers Association and released today, showed the state’s third-quarter increase was significantly higher than the national increase of 13.3 percent.

Kauai County led the isles’ third-quarter registration increases with a 23.7 percent surge. Hawaii County posted a 21.5 percent increase, Maui County had a 17.8 percent increase, and Oahu’s registrations rose15.9 percent.