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Hilo

HawaiiCDP

Photograph of Hilo
Featured view

Hilo

Total population

50,404

Median home value

$483,000

34.6%

Bachelor's+

Median income

$81,779

Hilo$82k
National$74k

Air quality index

25Good
Elevation18 m
Land area150.96 km²
Weather78°F · Chance Rain Showers
Coordinates19.69°, -155.08°

Demographic figures from US Census Bureau · ACS 5-year estimates. Overview below cites Wikipedia and may reference a different year.

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Active weather alerts
  • Special Weather Statement · Moderate
    Special Weather Statement issued June 27 at 7:03AM HST by NWS Honolulu HI

Source: NOAA National Weather Service.

City facts

Elevation
18 m
Area
150.96 km²
Time zone
UTC−10:00

Sister cities

Facts from Wikidata (CC0).

Overview

Hilo is the largest settlement in and the county seat of Hawaiʻi County, Hawaii, United States, which encompasses the Island of Hawaiʻi, and is a census-designated place (CDP). The population was 44,186 according to the 2020 census. It is the fourth-largest settlement in the state of Hawaiʻi, the largest settlement in the state outside of Oahu, and the largest settlement in the state outside of the Greater Honolulu Area.

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History & geography

History

Around 1100 AD, the first Hilo inhabitants arrived, bringing with them Polynesian knowledge and traditions. Although archaeological evidence is scant, oral history has many references to people living in Hilo, along the Wailuku and Wailoa rivers during the time of ancient Hawaiʻi. Oral history gives the meaning of Hilo as "to twist". Originally, the name "Hilo" applied to a district encompassing much of the east coast of the island of Hawaii, now divided into the District of South Hilo and the District of North Hilo. When William Ellis visited in 1823, the main settlement there was Waiākea on the south shore of Hilo Bay. Missionaries came to the district in the early-to-middle 19th century, founding Haili Church. Hilo expanded as sugar plantations in the surrounding area created jobs and drew in many workers from Asia. For example, by 1887, 26,000 Chinese workers worked in Hawai'i's sugar cane plantations, one of which was the Hilo Sugar Mill. At that time, the Hilo Sugar Mill produced 3,500 tons of sugar annually. A breakwater across Hilo Bay was begun in the first decade of the 20th century and completed in 1929. On April 1, 1946, an 8.6-magnitude earthquake near the Aleutian Islands created a tsunami that hit Hilo 4.9 hours later, killing 159 total in the islands, with 96 deaths in Hilo alone. In response, an early warning system, the Pacific Tsunami Warning Center, was established in 1949 to track these killer waves and provide warning. This tsunami also caused the end of the Hawaii Consolidated Railway, and instead the Hawaiʻi Belt Road was built north of Hilo using some of the old railbed. On May 22, 1960, another tsunami, caused by a 9.5-magnitude earthquake off the coast of Chile that day, claimed 61 lives, allegedly due to the failure of people to heed…

Geography

Hilo is on the eastern and windward side of the island. It is classified by the US Census Bureau as a census-designated place (CDP), and has a total area of , of which is land and of which (8.4%) is water. Hilo has a tropical rainforest climate (Köppen: Af), with substantial rainfall throughout the year. Its location on the windward coast (relative to the trade winds), makes it the fourth-wettest city in the United States, behind the southeast Alaskan cities of Whittier, Ketchikan and Yakutat, and one of the wettest in the world. An average of around of rain fell at Hilo International Airport annually between 1981 and 2010, with 272 days of the year receiving some rain. Monthly mean temperatures range from in February to in August. Hilo's location on the shore of the funnel-shaped Hilo Bay also makes it vulnerable to tsunamis.

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Excerpted from the corresponding Wikipedia article (CC BY-SA).

Demographics & economy

Median age
42.7
Median home value
$483,000
Housing units
19,265
Poverty rate
14.5%
Unemployment
6.8%

Race & ethnicity

White
14.9%
Black
0.7%
Asian
34.8%
Hispanic
11%

Source: US Census Bureau — American Community Survey, 5-year estimates.

Geography

Latitude
19.6887
Longitude
-155.0829
Water area
6.01 mi²
View on OpenStreetMap

Coordinates & boundaries from the US Census TIGER/Line shapefiles.

Climate

Avg high
77.8°F
Avg low
67.5°F
Annual precipitation
97.1 in

10-year averages from ERA5 reanalysis (Open-Meteo).

Current forecast

Today
78°F
Chance Rain Showers
Tonight
68°F
Occasional Rain Showers
Sunday
80°F
Chance Rain Showers
Sunday Night
69°F
Occasional Rain Showers
Monday
80°F
Chance Rain Showers
Monday Night
69°F
Occasional Rain Showers

Forecast for Hilo, HI from NOAA NWS API.

Air quality

US AQI — Good
25
PM2.5 (µg/m³)
5.2
PM10 (µg/m³)
8.4
Ozone (µg/m³)
73
NO₂ (µg/m³)
0.2

Current readings from Open-Meteo Air Quality API (Copernicus CAMS European reanalysis).

Industrial & pollution facilities

Natural hazard risk

Health (adults)

High blood pressure
24.6%
Diabetes
10.1%
Adult obesity
26.3%
Binge drinking
19.7%
Adult smoking
14.3%
No leisure activity
20.9%

Age-adjusted prevalence estimates from CDC PLACES (latest release).

Walkability

Amenities nearby

Wildlife & biodiversity

Observations (last 5 yrs, 10 mi)
59,139
Distinct species (top 10)
10

Most-observed species

  • Common Myna
    Acridotheres tristis (Linnaeus, 1766) · Aves
    3,514
  • Saffron Finch
    Sicalis flaveola (Linnaeus, 1766) · Aves
    3,291
  • Zebra Dove
    Geopelia striata (Linnaeus, 1766) · Aves
    3,137
  • Spotted dove
    Spilopelia chinensis (Scopoli, 1786) · Aves
    2,649
  • House Sparrow
    Passer domesticus (Linnaeus, 1758) · Aves
    2,359
  • Pacific Golden-Plover
    Pluvialis fulva (J.F.Gmelin, 1789) · Aves
    2,278
  • Yellow-billed Cardinal
    Paroaria capitata (d'Orbigny & Lafresnaye, 1837) · Aves
    2,268
  • Japanese White-eye
    Zosterops japonicus Temminck & Schlegel, 1845 · Aves
    1,950

Citizen-science & research observations from the Global Biodiversity Information Facility (GBIF).

Schools

Total
23
Elementary
14
Middle
3
High
4
Other
2

Largest nearby schools

  • Hilo High School
    High · Hilo · 1,317 students · 16.9:1 ratio
  • Waiakea High School
    High · Hilo · 1,297 students · 16.8:1 ratio
  • Keaau High School
    High · Keaau · 1,046 students · 15.8:1 ratio
  • Keaau Elementary School
    Elementary · Keaau · 821 students · 15.2:1 ratio
  • Waiakea Elementary School
    Elementary · Hilo · 789 students · 14.9:1 ratio
  • Waiakea Intermediate School
    Middle · Hilo · 774 students · 13.8:1 ratio
  • Keaau Middle School
    Middle · Keaau · 749 students · 15:1 ratio
  • Waiakeawaena Elementary School
    Elementary · Hilo · 684 students · 13.4:1 ratio

Public K–12 schools within ~10 mi from Urban Institute Education Data Portal (NCES Common Core of Data, 2022).

Earthquake history

Photos

Sights & places nearby

Notable people from here

People born within ~10 km, from Wikidata (CC0). Click any name for their Wikipedia article.

Nearby places in Hawaii

Browse all places in Hawaii

Geography & sun

Avg solar (kWh/m²/day)
5.28
Annual solar (kWh/m²)
1,927

Elevation, sunrise/sunset and daylight from Open-Meteo. Solar climatology from NASA POWER.

Nearby airports

Public attention

Wikipedia views (last 30 days)
9,846
Avg daily Wikipedia views
328
Attention level
Modest

Pageview totals from the Wikimedia Pageviews API.

Books about Hilo

Search results from Open Library.

Recent natural events nearby

Ground air-quality sensors

Recently spotted species

Research-grade observations from iNaturalist (within ~15 mi).

Nearest stream gauge

Site
Wailuku River at Piihonua, HI
Distance
4.7 mi
Streamflow
113 cfs
Gage height
3.16 ft

Live readings from USGS NWIS · measured 2026-06-27 09:50 UTC.

Events

Geotagged photos within ~6 miles of Hilo, from Wikimedia Commons contributors.

Photos via Wikimedia Commons — see each image page for license & attribution.

Sources

  • Wikipedia
  • US Census Bureau (ACS 5-year estimates)
  • Open-Meteo (ERA5 reanalysis)
  • NOAA National Weather Service
  • Wikimedia Commons
  • Wikidata
  • Open-Meteo Air Quality (CAMS)
  • USGS NWIS (water data)
  • NCES via Urban Institute Education Data Portal
  • GBIF (Global Biodiversity Information Facility)
  • iNaturalist
  • CDC PLACES
  • Open-Meteo / sunrise-sunset.org
  • Wikipedia Pageviews API
  • Open Library