In an effort to better understand the MSHS-eligible population and address the obstacles and barriers to accessing MSHS services that families face, the U.S. Department of Labor's Employment and Training Administration and the U.S. Department of Health and Human Services' Administration for Children and Families recently co-sponsored "Migrant and Seasonal Supplement to the National Agricultural Workers Survey - Report II," which presents data from the 2007-2011 National Agricultural Worker Survey (NAWS). The Supplement Report sorts through the larger NAWS sample, identifies MSHS-eligible families, and establishes regional and national estimates on a wide variety of descriptive information, including the childcare access, parent backgrounds, and family characteristics of MSHS-eligible households. This research brief first confirms the eligibility requirements that the NAWS uses for identifying MSHS-eligible families, and then provides a general overview of the contents within the 2015 MSHS Supplement Report, with a spotlight on the household complexity of MSHS-eligible households. (author abstracts)