Regional Codes ...
For statistical purposes, the US Census Bureau has divided the country into four Regions. Harbor Island is located in Region #4 (the West Region).
In turn, the US Census Bureau has further divided each Region into Divisions. Harbor Island is located in Division #9 (the Pacific Division).
The Office of Management and Budget (OMB) has created ten Federal Regions. Harbor Island is located in Region IX (Region 9).
The Federal Emergency Management Agency (FEMA) has created ten Management Regions. Harbor Island is located in Region IX (Region 9).
Referenced FIPS Records ...
FIPS Code: 06/32100 (Place Name: Harbor Island)
County: Orange (FIPS State/County: 06/059)
Identifies a populated place (ie- Harbor Island) which is wholly or substantially located within the boundaries of an incorporated place with a different name. The Part of Code identifies the incorporated place.
MSA Code: 5945