Westmorland is located at GR1.(33.037923, -115.622292)
As of the censusGR2 of 2000, there were 2,131 people, 625 households, and 501 families residing in the city. The population density was 2,057.0/km² (5,263.6/mi²). There were 667 housing units at an average density of 643.8/km² (1,647.5/mi²). The racial makeup of the city was 55.75% White, 1.03% Black or African American, 0.70% Native American, 0.33% Asian, 0.05% Pacific Islander, 39.42% from other races, and 2.72% from two or more races. 82.21% of the population were Hispanic or Latino of any race.
There were 625 households out of which 47.7% had children under the age of 18 living with them, 56.0% were married couples living together, 19.0% had a female householder with no husband present, and 19.7% were non-families. 17.0% of all households were made up of individuals and 8.5% had someone living alone who was 65 years of age or older. The average household size was 3.41 and the average family size was 3.87.
In the city the population was spread out with 35.8% under the age of 18, 10.5% from 18 to 24, 26.5% from 25 to 44, 17.7% from 45 to 64, and 9.6% who were 65 years of age or older. The median age was 29 years. For every 100 females there were 94.4 males. For every 100 females age 18 and over, there were 92.3 males.
The median income for a household in the city was $23,365, and the median income for a family was $26,667. Males had a median income of $27,500 versus $19,107 for females. The per capita income for the city was $8,941. About 27.3% of families and 27.2% of the population were below the poverty line, including 37.9% of those under age 18 and 14.6% of those age 65 or over.