Westhaven-Moonstone first appeared as a
census designated place in the
1990 U.S. census. The age distribution was 206 people (17.4%) under the age of 18, 72 people (6.1%) aged 18 to 24, 247 people (20.8%) aged 25 to 44, 356 people (30.0%) aged 45 to 64, and 306 people (25.8%) who were 65years of age or older. The median age was 48.3years. For every 100 females, there were 97.5 males, and for every 100 females age 18 and over there were 91.6 males age 18 and over. There were 516 households, out of which 116 (22.5%) had children under the age of 18 living in them, 213 (41.3%) were married-couple households, 38 (7.4%) were
cohabiting couple households, 149 (28.9%) had a female householder with no spouse or partner present, and 116 (22.5%) had a male householder with no spouse or partner present. 170 households (32.9%) were one person, and 79 (15.3%) were one person aged 65 or older. The average household size was 2.3. There were 301
families (58.3% of all households).
2010 census The
2010 United States census reported that Westhaven-Moonstone had a population of 1,205. The population density was . The
racial makeup of Westhaven-Moonstone was 1,083 (89.9%) White, 9 (0.7%) African American, 39 (3.2%) Native American, 18 (1.5%) Asian, 0 (0.0%) Pacific Islander, 10 (0.8%) from
other races, and 46 (3.8%) from two or more races. Hispanic or Latino of any race were 53 persons (4.4%). The Census reported that 1,205 people (100% of the population) lived in households, and none (0%) lived in non-institutionalized group quarters, and none (0%) were institutionalized. There were 548 households, out of which 128 (23.4%) had children under the age of 18 living in them, 226 (41.2%) were
opposite-sex married couples living together, 50 (9.1%) had a female householder with no husband present, 34 (6.2%) had a male householder with no wife present. There were 51 (9.3%)
unmarried opposite-sex partnerships, and 6 (1.1%)
same-sex married couples or partnerships. 170 households (31.0%) were made up of individuals, and 38 (6.9%) had someone living alone who was 65 years of age or older. The average household size was 2.20. There were 310
families (56.6% of all households); the average family size was 2.79. The population age distribution is 234 people (19.4%) under the age of 18, 62 people (5.1%) aged 18 to 24, 292 people (24.2%) aged 25 to 44, 432 people (35.9%) aged 45 to 64, and 185 people (15.4%) who were 65 years of age or older. The median age was 45.6 years. For every 100 females, there were 106.0 males. For every 100 females age 18 and over, there were 107.9 males. There were 623 housing units at an average density of , of which 548 were occupied, of which 365 (66.6%) were owner-occupied, and 183 (33.4%) were occupied by renters. The homeowner vacancy rate was 0.8%; the rental vacancy rate was 3.1%. 872 people (72.4% of the population) lived in owner-occupied housing units and 333 people (27.6%) lived in rental housing units. ==Politics==