Massachusetts Towns Ranked by US-Born Diversity: Native Population Racial and Ethnic Composition (2025)
While overall diversity includes foreign-born residents, US-born diversity reveals how native populations are distributed across racial and ethnic groups. This ranking of all 248 Massachusetts municipalities by non-foreign diversity shows where native-born Americans create multicultural communities versus where demographic homogeneity persists among US-born residents.
US-born diversity (non-foreign diversity) measures racial and ethnic diversity among native-born Americans—separate from foreign-born diversity. This analysis ranks all 248 Massachusetts places by diversity of their US-born populations using Census ACS 2022 5-year data, revealing where native-born Americans create multicultural communities and where demographic homogeneity persists among US-born residents.
Why US-Born Diversity Matters
Understanding US-born diversity helps:
- Identify where native populations create multicultural communities
- Understand demographic patterns among US-born residents
- Compare diversity patterns between native and foreign-born populations
- Evaluate community integration and demographic mixing
Note: This analysis uses overall race/ethnicity data as a proxy for US-born diversity, as Census doesn't provide race/ethnicity broken down by nativity for all places. For precise US-born diversity, we'd need detailed nativity-by-race cross-tabulations.
Data source: U.S. Census Bureau American Community Survey 2022 5-year estimates (2018-2022), Tables B03002 (Race/Ethnicity) and B05002 (Nativity).
📊US-Born Diversity Methodology
US-born diversity is calculated using Simpson's Diversity Index applied to the racial/ethnic composition of native-born populations. However, Census data limitations require using overall race/ethnicity as a proxy, since detailed nativity-by-race cross-tabulations aren't available for all places. Methodology: 1. Calculate overall race/ethnicity diversity (proxy for US-born diversity) 2. Note that this approximates US-born diversity since most diversity comes from native populations in many towns 3. For towns with high foreign-born percentages, this may underestimate US-born diversity Future enhancement: When detailed nativity-by-race data becomes available, we'll calculate precise US-born diversity indices.
🔗Related Analysis
This ranking complements our other diversity analyses: - Massachusetts Overall Diversity Rankings: Complete racial/ethnic diversity including all residents - Massachusetts Foreign-Born Diversity Rankings: Origin diversity of foreign-born residents - Massachusetts Demographic Sorting 2000-2024: How migration reshaped communities
Data Limitations
Future enhancement: When Census provides detailed nativity-by-race data, we'll calculate precise US-born diversity indices.
For now: This ranking provides a reasonable approximation of US-born diversity patterns, especially in towns with lower foreign-born percentages.
Data Methodology
Tables: B03002 (Race/Ethnicity), B05002 (Nativity)
Coverage: All 248 Massachusetts places (cities, towns, CDPs)
Diversity Index: Simpson's Diversity Index (1 - Σ(pi²)) converted to 0-100 scale
Note: Uses overall race/ethnicity as proxy for US-born diversity due to data limitations
Last Updated: November 2025
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