the 2010 united states census reported that potrero had a population of 656. the population density was 208.3 people per square mile (80.4/km²). the racial makeup of potrero was 338 (51.5%) white, 0 (0.0%) african american, 8 (1.2%) native american, 0 (0.0%) asian, 3 (0.5%) pacific islander, 281 (42.8%) from other races, and 26 (4.0%) from two or more races. hispanic or latino of any race were 499 persons (76.1%).