Language numbers are provided for:
- Number of households speaking Spanish at home that are linguistically isolated.
- Number of households speaking other non-English languages at home that are linguistically isolated
Source of data:
- For 2000 decennial census: U. S. Census Bureau. Census 2000 Summary File 4 (SF 4) – Sample Data. PCT42. HOUSEHOLD LANGUAGE BY LINGUISTIC ISOLATION  – Universe: Households
- For 2009 estimates: Based on data from the U.S. Census Bureau, IECAM demographers prepared estimates of the number of linguistically isolated households for years after the decennial census (i.e., years later than 2000). These data are available for the following geographic areas: state, county, township, municipality, IL state senate district, IL state house district, US Congressional district, ISBE region, and IDHS region.
Date of data: 2009
Note: The U.S. Census Bureau defines “linguistically isolated” as follows:
A linguistically isolated household is one in which no member 14 years old and over (1) speaks only English or (2) speaks a non-English language and speaks English “very well.” In other words, all members 14 years old and over have at least some difficulty with English. (U.S. Census Bureau. Census 2000)