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.
IECAM’s searchable database contains data on the following linguistic isolation variables from the U.S. Census Bureau:
- 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
Data on linguistic isolation by household are available by the following geographic regions: state of IL, counties, townships, municipalities, ISBE regions, IDHS regions, IL state senate districts, IL state house districts, US federal congressional districts.
Definition from U.S. Census Bureau:
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)
For additional details, see the Demographic: Language page.
How find these data:
To find data on linguistically isolated households, go to the IECAM Data Collection page at:
After selecting a region (e.g., County) and an instance of a region (e.g., Champaign County), select “Language” in the demographics section and click on the Submit button.
Regions in spreadsheets (by year):
- 2010-latest available data: all
- 2009: state, county, township, municipality
Regions in PDFs (by year):
- 2009-latest available data: county (speaking Spanish; languages other than English or Spanish)
Source of data: IECAM, based on several estimates from the Census Bureau
Note: Languages are those used by U.S. Census Bureau, American Community Survey.
Note: Data are based on answer to questions: “Does this person speak a language other than English at home?” and “What is this language?”
Note: For children age 5, use language of child. For children under age 5, use language of mother; if not mother present, use language of father; if no father present, use language of head of household; if no head of household present, indicate unknown. Thus, the data represent the language spoken by the child or likely being learned by the child.
Note: The fact that a child is reported as speaking or learning one of these non-English languages does not imply that the child does not know or is not learning English also.
Note: View more information on IPUMS.
Note: View more information on PUMAs.
Note: A full explanation of the methodology that IECAM uses to create estimates can be found via the Data Releases & Methodology page.
Note: The data for the years 2005 through the most recent available (for all regions) can be found via the Tabular Data Search page.