Geographic.org
- Author permits use of compact GIF image of Puerto Rico map on web pages.
- http://www.geographic.org/maps/new2/puerto_rico_maps.html

University of Texas Libraries - Commonwealth of Puerto Rico 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/puerto_rico.html

Metro Data Map Company
- Map makers offering several types of maps in CD, ZIP or diskette format.
- http://www.metropr.com/