Muddy is a CDP located in Big Horn County, Montana. Muddy has a 2026 population of 647. Muddy is currently growing at a rate of 0.31% annually and its population has decreased by 0% since the most recent census, which recorded a population of 0 in 2020.
The median age in Muddy is 18.4 years: 15.2 years for males, and 23.2 years for females. For every 100 females there are 65.7 males.
Data after 2023 is projected based on recent change
Overall: 18.4 years
Female: 23.2 years
Male: 15.2 years
There are 372 adults, (37 of whom are seniors) in Muddy.
Female: 437 (60.4%)
Male: 287 (39.6%)
The racial composition of Muddy includes 93.51% Native American, 6.49% White, and smaller percentages for and multiracial populations.
| Race | Population ↓ | Percentage (of total) |
|---|---|---|
| Native American | 677 | 93.51% |
| White | 47 | 6.49% |