Population trends have been relatively stable, fluctuating between about 1,250 and 1,400 residents over the decade. This stability, combined with rising incomes, indicates a community that is economically healthy but not experiencing rapid growth or dramatic demographic shifts.

Treynor's racial composition is less diverse than the national average. The U.S. Census Bureau estimated that the white alone, not Hispanic or Latino population was about 59% nationally in 2022, compared to 95% in Treynor. The median household income in Treynor ($84,643 in 2022) is higher than the national median household income, which was approximately $70,784 in 2021. The slow increase in Hispanic population mirrors broader national trends of growing Hispanic populations in many communities, although at a much slower rate in Treynor.

Treynor remains a predominantly white, affluent community with low diversity. There are signs of incremental changes towards increased diversity. These changes, coupled with rising median incomes, suggest a stable community that may be slowly transitioning towards a more diverse demographic profile, albeit at a much slower pace than national trends. The community's economic prosperity may be a factor in attracting a slightly more diverse population, potentially setting the stage for more significant demographic shifts in the future if these trends continue.