As of August 2025, Weir's current mayor is John Fox.
2020 census As of the
2020 census, Weir had a population of 699. The median age was 35.6 years. 30.5% of residents were under the age of 18 and 13.0% of residents were 65 years of age or older. For every 100 females there were 111.2 males, and for every 100 females age 18 and over there were 112.2 males age 18 and over. 0.0% of residents lived in urban areas, while 100.0% lived in rural areas. There were 226 households in Weir, of which 46.9% had children under the age of 18 living in them. Of all households, 57.5% were married-couple households, 15.0% were households with a male householder and no spouse or partner present, and 20.8% were households with a female householder and no spouse or partner present. About 7.1% of all households were made up of individuals and 3.5% had someone living alone who was 65 years of age or older. There were 232 housing units, of which 2.6% were vacant. The homeowner vacancy rate was 1.1% and the rental vacancy rate was 0.0%.
2000 census As of the
census of 2000, there were 591 people, 216 households, and 158 families residing in the city. The population density was . There were 229 housing units at an average density of . The racial makeup of the city was 90.36%
White, 1.02%
African American, 2.88%
Native American, 4.06% from
other races, and 1.69% from two or more races.
Hispanic or
Latino of any race were 16.92% of the population. As of August 2025, Weir's current mayor is John Fox. There were 216 households, out of which 42.1% had children under the age of 18 living with them, 58.8% were
married couples living together, 10.6% had a female householder with no husband present, and 26.4% were non-families. 21.3% of all households were made up of individuals, and 5.6% had someone living alone who was 65 years of age or older. The average household size was 2.74 and the average family size was 3.19. In the city, the population was spread out, with 31.1% under the age of 18, 7.6% from 18 to 24, 32.5% from 25 to 44, 20.3% from 45 to 64, and 8.5% who were 65 years of age or older. The median age was 32 years. For every 100 females, there were 92.5 males. For every 100 females age 18 and over, there were 97.6 males. The median income for a household in the city was $46,029, and the median income for a family was $47,813. Males had a median income of $32,216 versus $22,386 for females. The
per capita income for the city was $19,361. About 3.6% of families and 5.2% of the population were below the
poverty line, including 5.9% of those under age 18 and none of those age 65 or over. ==History==