 san carlos is a community and census-designated place (cdp) in hidalgo county, texas. the population was 3,130 at the 2010 united states census. it is part of the mcallen&ndash;edinburg&ndash;mission metropolitan statistical area. san carlos is located northeast of mcallen. ==geography== san carlos is located at  (26.297004, -98.069408). according to the [[united stat
Census-designated_places_in_Hidalgo_County,_Texas Census-designated_places_in_Texas