The total population of Judith Gap is estimated to be 140 with 86 males (61.43%) and 54 females (38.57%). There are 32 less females than males in Judith Gap.
In 2022, the population of Judith Gap was 107, a 0.93% decrease year-by-year from 2021. Previously, in 2021, Judith Gap's population was 108, a decline of 2.70% compared to a population of 111 in 2020.
The median age in Judith Gap, MT is 63.9, as per 2021 ACS 5-Year Estimates. Of the total population, 20.00% were under the age of 15, 0.00% aged 15 to 29, 30.43% aged 30 to 64, 47.83% aged 65 to 84, and 1.74% were 85 years of age and older.