The median income in Terryville has fluctuated over the years but has generally trended upward. In 2013, the median income was $82,259, and by 2022 it had decreased slightly to $78,973. There was a peak in 2021 at $92,654, suggesting some economic volatility in recent years. The population has seen a slight decline from 16,985 in 2013 to 16,374 in 2022. This modest population decrease, coupled with the increasing diversity and relatively stable median income, might indicate a gradual demographic transition without significant economic disruption.

The demographic shifts observed in Terryville align with broader national trends of increasing diversity in suburban areas. Many traditionally homogeneous suburban communities across the United States have experienced similar transitions over the past decade, with growing minority populations and a decrease in the proportion of white residents. The economic resilience of Terryville, as evidenced by its relatively stable median income despite demographic changes, is noteworthy. This suggests that the community has maintained its economic status while becoming more diverse.

The increase in residents identifying as two or more races (from 1% to 9%) is significant and mirrors a national trend observed in the 2020 Census, where the multiracial population in the United States grew substantially. Terryville exemplifies a gradual but steady transition from a Low Diversity, White Majority community to a more diverse suburb. While still maintaining a White Majority, the increasing representation of various racial groups indicates a trend towards greater diversity. This demographic evolution, coupled with relatively stable economic indicators, suggests that Terryville is adapting to changing population dynamics while preserving its economic character.