Twin lakes first appeared as an unincorporated community in the
1960 U.S. census; The census reported that 96.1% of the population lived in households, 2.6% lived in non-institutionalized group quarters, and 1.3% were institutionalized. The age distribution was 14.5% under the age of 18, 8.2% aged 18 to 24, 29.8% aged 25 to 44, 25.5% aged 45 to 64, and 22.0% who were 65years of age or older. The median age was 43.0years. For every 100 females, there were 92.8 males.
2010 At the
2010 census Twin Lakes had a population of 4,917. The population density was . The racial makeup of Twin Lakes was 3,900 (79.3%) White, 70 (1.4%) African American, 61 (1.2%) Native American, 126 (2.6%) Asian, 8 (0.2%) Pacific Islander, 534 (10.9%) from other races, and 218 (4.4%) from two or more races. Hispanic or Latino of any race were 1,109 persons (22.6%). The census reported that 4,782 people (97.3% of the population) lived in households, 35 (0.7%) lived in non-institutionalized group quarters, and 100 (2.0%) were institutionalized. There were 2,223 households, 463 (20.8%) had children under the age of 18 living in them, 669 (30.1%) were
opposite-sex married couples living together, 232 (10.4%) had a female householder with no husband present, 102 (4.6%) had a male householder with no wife present. There were 227 (10.2%)
unmarried opposite-sex partnerships, and 21 (0.9%)
same-sex married couples or partnerships. 813 households (36.6%) were one person and 274 (12.3%) had someone living alone who was 65 or older. The average household size was 2.15. There were 1,003 families (45.1% of households); the average family size was 2.84. The age distribution was 770 people (15.7%) under the age of 18, 651 people (13.2%) aged 18 to 24, 1,572 people (32.0%) aged 25 to 44, 1,220 people (24.8%) aged 45 to 64, and 704 people (14.3%) who were 65 or older. The median age was 36.8 years. For every 100 females, there were 94.8 males. For every 100 females age 18 and over, there were 91.4 males. There were 2,741 housing units at an average density of 2,263.7 per square mile, of the occupied units 820 (36.9%) were owner-occupied and 1,403 (63.1%) were rented. The homeowner vacancy rate was 3.5%; the rental vacancy rate was 3.9%. 1,673 people (34.0% of the population) lived in owner-occupied housing units and 3,109 people (63.2%) lived in rental housing units. ==Government==