 According to the United States Census Bureau, Pennsville had a total area of 10.422 square miles (26.993 km2), including 10.065 square miles (26.069 km2) of land and 0.357 square miles (0.924 km2) of water (3.42%).As of the 2000 United States Census there were 11,657 people, 4,684 households, and 3,292 families living in the CDP.The population density was 429.5/km² (1,112.7/mi²).