#5. Kalawao County

- 2010 to 2020 population change: -8
--- #1,499 among all counties nationwide
- 2010 to 2020 percent population change: -8.9%
--- #5 among counties in Hawaii, #2,777 among all counties nationwide
- 2020 population: 82
--- #5 largest county in Hawaii, #3,141 largest county nationwide

#4. Kauai County

- 2010 to 2020 population change: +6,207
--- #530 among all counties nationwide
- 2010 to 2020 percent population change: +9.3%
--- #1 among counties in Hawaii, #465 among all counties nationwide
- 2020 population: 73,298
--- #4 largest county in Hawaii, #752 largest county nationwide

#3. Maui County

- 2010 to 2020 population change: +9,920
--- #424 among all counties nationwide
- 2010 to 2020 percent population change: +6.4%
--- #4 among counties in Hawaii, #672 among all counties nationwide
- 2020 population: 164,754
--- #3 largest county in Hawaii, #405 largest county nationwide

#2. Hawaii County

- 2010 to 2020 population change: +15,550
--- #340 among all counties nationwide
- 2010 to 2020 percent population change: +8.4%
--- #2 among counties in Hawaii, #526 among all counties nationwide
- 2020 population: 200,629
--- #2 largest county in Hawaii, #339 largest county nationwide

#1. Honolulu County

- 2010 to 2020 population change: +63,301
--- #99 among all counties nationwide
- 2010 to 2020 percent population change: +6.6%
--- #3 among counties in Hawaii, #656 among all counties nationwide
- 2020 population: 1,016,508
--- #1 largest county in Hawaii, #46 largest county nationwide