The median income has shown significant improvement, rising from $34,609 in 2013 to $53,301 in 2022, an increase of about 54%. The population has grown from 1,818 in 2013 to 2,172 in 2022, an increase of approximately 19%.

As the community became more diverse, there was a corresponding increase in median income. This could suggest that increased diversity might be linked to economic opportunities or that economic growth is attracting a more diverse population. The growth in the Hispanic population coincides with the period of economic improvement, potentially indicating that this group may be moving to the area for employment opportunities. The decrease in the Native American population percentage, despite overall population growth, might suggest outmigration, possibly related to seeking opportunities elsewhere or other socio-economic factors.

The income growth in this zip code outpaces the national average, which typically sees slower growth rates. The demographic shifts, particularly the growth in Hispanic population, align with broader national trends of increasing diversity in rural and suburban areas. The maintenance of a significant Native American population is unique compared to many other U.S. communities and likely reflects the area's proximity to tribal lands.

Zip code 59821 in Arlee, Montana, represents a gradually diversifying community with improving economic indicators. While it remains a "White Majority" area, the increasing representation of Hispanic residents and those of mixed race suggests a slow but steady transition towards greater diversity. This demographic evolution, coupled with significant income growth, indicates a community in transition, potentially benefiting from the economic and cultural contributions of its increasingly diverse population.