Mountain Lake is an unincorporated community and census-designated place (CDP)State of New Jersey Census Designated Places - BVP20 - Data as of January 1, 2020, United States Census Bureau. Accessed December 1, 2022. located within Liberty Township in Warren County, in the U.S. state of New Jersey,Locality Search, State of New Jersey. Accessed April 19, 2015. that was created as part of the 2010 United States census.GCT-PH1 - Population, Housing Units, Area, and Density: 2010 - County -- County Subdivision and Place from the 2010 Census Summary File 1 for Warren County, New Jersey , United States Census Bureau. Accessed June 4, 2013.2006-2010 American Community Survey Geography for New Jersey, United States Census Bureau. Accessed June 4, 2013.New Jersey: 2010 - Population and Housing Unit Counts - 2010 Census of Population and Housing (CPH-2-32), United States Census Bureau, p. III-5, August 2012. Accessed June 4, 2013. "Warren County—Name Changes: Beattystown CDP name corrected from Beatyestown; New CDPs: Allamuchy (formed from part of deleted Allamuchy-Panther Valley CDP), Anderson, Asbury, Blairstown, Brainards, Bridgeville, Broadway, Brookfield, Buttzville, Columbia, Delaware, Delaware Park, Finesville, Great Meadows (formed from part of deleted Great Meadows-Vienna CDP and additional area), Greenwich, Hainesburg, Harmony, Hope, Hutchinson, Johnsonburg, Lopatcong Overlook, Marksboro, Mountain Lake, Mount Hermon, New Village, Panther Valley (formed from part of deleted Allamuchy-Panther Valley CDP), Port Colden, Port Murray, Silver Lake, Stewartsville, Upper Pohatcong, Upper Stewartsville, and Vienna (formed from part of deleted Great Meadows-Vienna and additional area)" As of the 2020 United States census, the CDP's population was 494 a decrease of 81 (−14.1%) from the 575 recorded at the 2010 census.DP-1 - Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data for Mountain Lake CDP, New Jersey, United States Census Bureau. Accessed June 3, 2013.
Geography According to the United States Census Bureau, the CDP had a total area of 1.305 square miles (3.381 km2), including 1.130 square miles (2.927 km2) of land and 0.175 square miles (0.453 km2) of water (13.41%).
Demographics
Mountain Lake first appeared as a census designated place in the 2010 U.S. census.
2020 census +Mountain Lake CDP, New Jersey – Racial and ethnic compositionRace / Ethnicity (NH = Non-Hispanic)Pop 2010Pop 2020% 2010% 2020White alone (NH)53944193.74%89.27%Black or African American alone (NH)340.52%0.81%Native American or Alaska Native alone (NH)100.17%0.00%Asian alone (NH)831.39%0.61%Native Hawaiian or Pacific Islander alone (NH)000.00%0.00%Other race alone (NH)330.52%0.61%Mixed race or Multiracial (NH)781.22%1.62%Hispanic or Latino (any race)14352.43%7.09%Total575494 100.00%100.00%
2010 census The 2010 United States census counted 575 people, 261 households, and 154 families in the CDP. The population density was . There were 315 housing units at an average density of . The racial makeup was 95.65% (550) White, 0.52% (3) Black or African American, 0.17% (1) Native American, 1.39% (8) Asian, 0.00% (0) Pacific Islander, 0.87% (5) from other races, and 1.39% (8) from two or more races. Hispanic or Latino of any race were 2.43% (14) of the population.
Of the 261 households, 23.0% had children under the age of 18; 44.8% were married couples living together; 8.8% had a female householder with no husband present and 41.0% were non-families. Of all households, 32.2% were made up of individuals and 11.1% had someone living alone who was 65 years of age or older. The average household size was 2.20 and the average family size was 2.84.
17.7% of the population were under the age of 18, 9.0% from 18 to 24, 22.1% from 25 to 44, 38.1% from 45 to 64, and 13.0% who were 65 years of age or older. The median age was 45.3 years. For every 100 females, the population had 99.7 males. For every 100 females ages 18 and older there were 98.7 males.
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