The population has remained relatively stable, fluctuating between approximately 15,500 and 15,900 over the decade. This stability, combined with the overall increase in median income, suggests a generally improving economic situation for the existing population rather than significant in-migration altering the demographic composition.

The racial homogeneity of Vermilion is notably high compared to national averages. In 2022, the U.S. Census Bureau estimated that the white alone, not Hispanic or Latino population in the United States was about 59%, significantly lower than Vermilion's 93%. The gradual increase in Hispanic population aligns with broader national trends of growing Hispanic communities across the United States, though at a much slower rate in Vermilion.

The median household income in Vermilion ($68,230 in 2022) is slightly higher than the national median household income, which was about $70,784 in 2021. The stability of the population suggests that Vermilion is not experiencing the rapid growth or decline seen in some other small cities across the U.S.

Vermilion shows signs of very gradual diversification and overall economic improvement over the past decade. It remains a predominantly white, economically stable community with a "Low Diversity" classification. The slow pace of demographic change suggests that any significant shift in the community's diversity profile is likely to occur over a much longer timeframe, barring any major external factors influencing migration patterns or local demographics.