Waimalu, Hawaii
11 topographic sheets cover this place, the earliest surveyed in 1954 and the latest in 1998. It stands in the Ewa census division. It lies in ZIP code area 96701. It lies near Punanani Gulch. The Survey maps it on the Waipahu quadrangle. 13,817 people lived here at the 2020 count. It stands 377 feet above sea level.
On record in Waimalu
Buildings and businesses the archive holds for this place. Each opens its own page, with the source record it came from.
On the National Register 1 record
Waimalu Shopping Centerlisted 2021
Population over time
2 figuresWaimalu grew from 13,730 to 13,817 between 2010 and 2020. These are the recorded population figures Wikidata holds for this place, reached through the Geographic Names Information System number this page is keyed on rather than by name, so they belong to this place and not to another of the same name. Most are census counts, but not all are: an early figure may be a founding or settlement estimate, and an estimate published within five years of a census is left out. The change column is computed, and is left blank where more than 20 years separate a figure from the one before it, because a gap that long is not a change between two counts.
| Year | People | Change |
|---|---|---|
| 2010 | 13,730 | |
| 2020 | 13,817 | +87 (+1%) |
Topographic sheets covering this place
9 surveys from 11 printed sheetsMatched by testing this settlement's coordinate against the published boundary of every sheet in the United States Geological Survey's historical collection. Each opens the scanned sheet at the Survey.
- 1954 USGS Oahu quadrangle1:250000
- 1954 USGS Waipahu quadrangle1:24000
- 1959 USGS Waipahu quadrangle1:24000
- 1961 USGS Oahu quadrangle1:250000
- 1965 USGS Oahu quadrangle1:250000, 2 printings
- 1968 USGS Waipahu quadrangle1:24000
- 1970 USGS Oahu quadrangle1:250000, 2 printings
- 1983 USGS Waipahu quadrangle1:24000
- 1998 USGS Waipahu quadrangle1:24000
Fires near this place
841 since 1992Regional context, not property-specific evidence. The federal wildfire occurrence database lists 841 fires within 5 miles of Waimalu between 1992 and 2017, burning about 3,334 acres in total. None started naturally. 1 was recorded as arson. Distance is straight-line from the map coordinates, so a fire counted here may appear on a neighbouring settlement's page as well.
| Reported cause | Fires |
|---|---|
| Missing data/not specified/undetermined | 839 |
| Arson/incendiarism | 1 |
| Recreation and ceremony | 1 |
The most recent of them, most recent first, with the day each was reported and the service that recorded it.
| Date | Cause | Size | Reported by | Name on the report |
|---|---|---|---|---|
| 9 September 2012 | Missing data/not specified/undetermined | under an acre | City and County of Honolulu | not named |
| 9 September 2009 | Missing data/not specified/undetermined | under an acre | City and County of Honolulu | not named |
| 9 September 2009 | Missing data/not specified/undetermined | 20 acres | City and County of Honolulu | not named |
| 8 September 2009 | Missing data/not specified/undetermined | under an acre | City and County of Honolulu | not named |
| 8 September 2008 | Missing data/not specified/undetermined | under an acre | City and County of Honolulu | not named |
| 8 September 2004 | Missing data/not specified/undetermined | under an acre | City and County of Honolulu | not named |
| 7 September 2003 | Missing data/not specified/undetermined | under an acre | City and County of Honolulu | not named |
| 6 September 2012 | Missing data/not specified/undetermined | 1.5 acres | City and County of Honolulu | not named |
Settlements close enough to share some of these fires:
Mines and quarries near this place
1 within 5 milesRegional context, not property-specific evidence. The federal mineral resources record lists 1 working within 5 miles of Waimalu: 1 producer. All of them still produce. What was taken out: Stone. Distance is straight-line from the map coordinates, so a quarry counted here may appear on a neighbouring settlement's page as well.
| Where | Site | Commodity | Status | Recorded |
|---|---|---|---|---|
| Halawa Quarry and Mill | Stone | Producer |
Storms near this place
8 since 2013Regional context, not property-specific evidence. The National Weather Service names Waimalu in 8 storm reports between 2013 and 2025: 5 heavy rain, 2 flash flood, 1 flood. No death or injury is recorded in these reports. Each account below is quoted exactly as the forecast office filed it, from the NOAA Storm Events Database, and each date opens the federal record of that event.
| When | Event | Place named | Harm | What the report says |
|---|---|---|---|---|
| December 2025 | Flood | Waimalu | - | Multiple roads reportedly had several feet of water, due to poor drainage. These roads included Richards Street, H-1 westbound under Radford Drive, and Nimitz Highway near the Likelike Highway. Additionally, there was a water rescue in Kalihi. |
| October 2018 | Flash Flood | Waimalu | - | The three right lanes of the east-bound H-1 Freeway became impassable after flooding from heavy rain. |
| August 2015 | Flash Flood | Waimalu | - | Two lanes along H-1 westbound near the Waimalu off-ramp on Oahu were flooded and became impassable. |
| March 2021 | Heavy Rain | Waimalu | - | no account filed |
| November 2020 | Heavy Rain | Waimalu | - | no account filed |
| March 2017 | Heavy Rain | Waimalu | - | no account filed |
| October 2016 | Heavy Rain | Waimalu | - | no account filed |
| March 2013 | Heavy Rain | Waimalu | - | no account filed |
Nearest settlements
The eight closest, with where each one stands in the county. Distances are straight-line, computed from the Geographic Names Information System coordinates.
| Map | Place | Distance | Sheets |
|---|---|---|---|
| Pearl City | 0.8 miles | 11 | |
| Waiau | 1.2 miles | 11 | |
| Kalauao | 1.5 miles | 11 | |
| Pacific Palisades | 1.5 miles | 11 | |
| ʻAiea | 1.6 miles | 11 | |
| ʻAiea Heights | 1.7 miles | 11 | |
| ʻEwa-Schofield Junction | 2.0 miles | 11 | |
| Hālawa | 2.1 miles | 11 |
Elsewhere
Matched on this settlement's Geographic Names Information System number rather than its name, so it cannot be a different place of the same name in another state.
| Wikipedia article on Waimalu | An encyclopaedic summary. Its text is share-alike, so it is linked here rather than copied. |
| Wikidata item Q2541865 | The structured record the population and elevation above come from. Public domain (CC0). |
Provenance
This settlement is recorded in the Geographic Names Information System as feature 1867264. The sheet list is computed by point-in-boundary test against the United States Geological Survey's historical topographic inventory. Both are works of the United States government and carry no copyright under 17 U.S.C. 105.
Wildfire. Short, Karen C. 2022. Spatial wildfire occurrence data for the United States, 1992-2020 [FPA_FOD_20221014]. 6th Edition. Fort Collins, CO: Forest Service Research Data Archive. https://doi.org/10.2737/RDS-2013-0009.6 Collected with United States Government funding and usable without additional permissions or fees.
Mines and quarries. USGS Mineral Resources Data System (MRDS) https://mrdata.usgs.gov/mrds/ A work of the United States government, no copyright under 17 U.S.C. 105.
Storms. NOAA National Centers for Environmental Information, Storm Events Database https://www.ncei.noaa.gov/stormevents/ A work of the United States government, no copyright under 17 U.S.C. 105. Narratives are quoted verbatim from the National Weather Service report and are not edited or summarised.








