There are 78 municipalities in Puerto Rico.
Names from CIA World Factbook (http://www.cia.gov/cia/publications/factbook/geos/rq)
... mi²). 11.9 km² (4.6 mi²) of it is land and 1.2 km² (0.4 mi²) of it is water. The total area is 8.91% water. Demographics As of the census of ...