ZIP Codes have been created by the United States Postal Service (USPS) as a way of grouping addresses to make delivery more efficient. The boundaries of the ZIP Code can be changed, re-assigned, eliminated or overlapped with other ZIP Codes. So keep in mind that any given ZIP Code is only 'loosely' associated with a community (such as Honolulu). When looking for a ZIP Code, whether Honolulu or elsewhere, it's always best to check the website of the United States Postal Service (USPS).
The elevation is an estimate for the area around Honolulu - it will be higher in some places and lower in others.
<3>
Longitude & latitude values may not be the geographic center of Honolulu, rather it may be a prominent intersection or the center of population, etc. It will vary depending on the source.
<4>
Name of the USGS 7.5 Minute topographic map which includes Honolulu.
<5>
Every year, the US Census Bureau creates a population estimate for the preceeding year. Keep in mind that this value is an estimate and not an actual count. The most recent Census estimate is for the year 2019.
