2020 census As of the
2020 census, Westmorland had a population of 2,014, all of whom lived in households. The population density was . The median age was 32.5 years. The age distribution was 656 people (32.6%) under the age of 18, 165 people (8.2%) aged 18 to 24, 466 people (23.1%) aged 25 to 44, 445 people (22.1%) aged 45 to 64, and 282 people (14.0%) who were 65 years of age or older. For every 100 females there were 92.0 males, and for every 100 females age 18 and over there were 87.1 males age 18 and over. 0.0% of residents lived in urban areas, while 100.0% lived in rural areas.
2010 census At the
2010 census Westmorland had a population of 2,225. The population density was . The racial makeup of Westmorland was 1,038 (46.7%) White, 21 (0.9%) African American, 38 (1.7%) Native American, 11 (0.5%) Asian, 0 (0.0%) Pacific Islander, 1,042 (46.8%) from
other races, and 75 (3.4%) from two or more races. Hispanic or Latino of any race were 1,938 persons (87.1%). The whole population lived in households, no one lived in non-institutionalized group quarters and no one was institutionalized. There were 631 households, 336 (53.2%) had children under the age of 18 living in them, 299 (47.4%) were
opposite-sex married couples living together, 174 (27.6%) had a female householder with no husband present, 61 (9.7%) had a male householder with no wife present. There were 61 (9.7%)
unmarried opposite-sex partnerships, and 4 (0.6%)
same-sex married couples or partnerships. 89 households (14.1%) were one person and 42 (6.7%) had someone living alone who was 65 or older. The average household size was 3.53. There were 534 families (84.6% of households); the average family size was 3.82. The age distribution was 765 people (34.4%) under the age of 18, 234 people (10.5%) aged 18 to 24, 527 people (23.7%) aged 25 to 44, 449 people (20.2%) aged 45 to 64, and 250 people (11.2%) who were 65 or older. The median age was 29.2 years. For every 100 females, there were 87.8 males. For every 100 females age 18 and over, there were 86.9 males. There were 678 housing units at an average density of , of which 631 were occupied, 299 (47.4%) by the owners and 332 (52.6%) by renters. The homeowner vacancy rate was 1.6%; the rental vacancy rate was 5.9%. 1,066 people (47.9% of the population) lived in owner-occupied housing units and 1,159 people (52.1%) lived in rental housing units. ==Politics==