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The total population of Westby is estimated to be 213 with 96 males (45.07%) and 117 females (54.93%). There are 21 more females than males in Westby.
In 2022, the population of Westby was 167, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Westby's population was 167, an increase of 0.60% compared to a population of 166 in 2020.
The median age in Westby, MT is 54.0, as per 2021 ACS 5-Year Estimates. Of the total population, 4.21% were under the age of 15, 8.42% aged 15 to 29, 61.58% aged 30 to 64, 20.00% aged 65 to 84, and 5.79% were 85 years of age and older.
Racial distribution of Westby population: 98.42% are White and 1.58% are multiracial.