The number of US residents who are deemed to be Limited English Proficient (LEP) has increased substantially in recent decades, consistent with the growth in the US foreign-born population. While many LEP individuals are still attracted to the historic immigrant-destination states of California, Texas, New York, New Jersey, Florida, and Illinois, significant numbers are opting to settle in nontraditional destinations in the Southeastern, Southwestern, and Northwestern United States. Sustained high rates of immigration and the dispersion of LEP individuals to these new destination states have meant that an increasing number of states and localities must grapple with issues of communication and English language learning. Further, as the LEP population has grown, so has its linguistic diversity. This data brief provides the most up-to-date analysis on the number, share, growth, and linguistic diversity of LEP individuals in the United States. This information is compiled from US Census Bureau and Census Bureau American Community Survey (ACS) data, in order to assist the wide array of stakeholders at the national, state, and local levels attempting to understand and address the challenges and opportunities created by language diversity. While this brief focuses on those states with the largest concentration or highest growth rates of LEP populations, two online companion charts include demographic data on number, share, growth, and linguistic diversity of the LEP population in all 50 states. Approach for data used in this brief is appended. (Contains 2 maps, 7 tables, 1 figure, and 15 endnotes.)