The median income in Derby has shown an upward trend over the past decade, increasing from $54,957 in 2013 to $73,381 in 2022, a growth of about 33.5%. This economic improvement has occurred alongside minor fluctuations in racial composition, but without significant demographic shifts.

The population of the zip code has declined over the decade, from 321 in 2013 to 291 in 2022, with fluctuations in between. The lowest point was 215 residents in 2017, followed by a gradual increase. This population trend does not appear to have negatively impacted median income growth.

Derby's demographic profile contrasts with national trends towards increasing diversity. Its persistent "Low Diversity" classification and overwhelming white majority suggest it has remained relatively insulated from broader demographic shifts occurring in many parts of the country.

The economic growth in median income potentially reflects broader economic improvements seen in many parts of the U.S. over the past decade. However, without more context about the local economy or comparable communities, it is challenging to determine if this growth is exceptional or in line with regional trends.

Derby presents a case of a small, predominantly white community that has maintained its racial homogeneity over the past decade while experiencing notable economic growth. The stability in its demographic composition, coupled with rising incomes, suggests a community that has seen economic improvements without significant changes to its racial makeup.