The Modern Languages Association Language Map Data Center can be used to search for languages spoken by state, region, division, county, city, town or zip code. Data is available for the years 2000, 2005, and 2010.
Data on specific languages through 2016 is also available from the Modern Language Association Language Enrollment Database.
MLA Language Map Data Center | Modern Language Association
Find the information you need by calling the library's Infoline at 520-791-4010 or by sending your question to Askalibrarian.