Sitemap to all pages covering the state of Hawaii. Photography by Kevin Trinkle, Larry Epstein and Alex Nitzman.

Highway Guides

Hawaii State Highway Numbering

The numbering of Hawaii State Highways utilizes a cluster system based upon island which they are found. Highways in the 100s and 200s or those between 11 and 19 are found on the Big Island of Hawaii. Maui is home to routes numbered in the 30s or 300s. Molokai and Lanai use routes numbered in the 400s. Kauai follows with routes in the 50s and 500s. Oahu rounds out the numbering with highways between 60-99 and the 600s and up.

Hawaii County Highway Numbering

Hawaii County Highways utilize the same route clustering of their state route counterparts. Most spoke from the parent state route and utilize a 4-digit numbering where the first two numbers are those of the parent. When signed, the county highways utilize the same shield style as regular state highways. However, most county highways are not posted and exist as local access roads or residential thoroughfares.

Population Statistics

State Population
1,455,271
County Populations
Honolulu 1,016,508 Hawaii 200,629 Maui 164,754
Kauai 73,298 Kalawao 82
Source: 2020 U.S. Census Data

About Hawaii

  • Capital: Honolulu (Island of Oahu)
  • Nickname: Aloha State
  • State Flower: Yello Hibiscus
  • State Bird: Hawaiian Goose
  • State Tree: Candlenut
  • Land Area: 6,421 square miles, 47th largest
  • Highest Point: Mauna Kea (Island of Hawaii) 13,803 feet above sea level
  • Agriculture: cattle, sugarcane, coffee, macadamia nuts
  • Statehood: 50th state; admitted August 21, 1959
  • Total Interstate Mileage: 54.91 miles

Updated December 31, 2021.