Guam Zip Codes
- Offers an up-to-date and complete listing of Guam zip codes.
- http://www.guamzipcodes.com/

University of Texas Libraries - Guam Maps
- Country, city and thematic maps from the Perry-Castañeda Library Map Collection, along with links to maps on other web sites.
- http://www.lib.utexas.edu/maps/guam.html

Guam's location
- Map and aerial photograph.
- http://ns.gov.gu/location.html