The Survey of Head Start Grantees on Training and Technical Assistance (T/TA) was conducted in program year 2019-2020 with a nationally representative sample of Head Start program directors and Head Start managers/coordinators to understand how Head Start grantees use T/TA of all types and from all sources. Head Start program directors completed one survey about their program's use of T/TA, and one manager/coordinator per program completed a separate survey focused on T/TA related to their content area (managers/coordinators represented the following four content areas of Head Start practice: (1) early childhood development and education; (2) fiscal operations; (3) family and community services; and (4) health, mental health, and safety). The study, conducted between October 2019 and April 2020, was sponsored by the Office of Planning, Research, and Evaluation (OPRE) at the Administration for Children and Families (ACF). This report describes the background of the study, research questions, sample design, the collaborative survey design process, questionnaire content, and data collection procedures. The survey was designed to provide the Office of Head Start (OHS) with descriptive information about the breadth of grantees' T/TA needs and experiences across Head Start, Early Head Start, American Indian and Alaska Native (AIAN) Head Start, Migrant and Seasonal Head Start, and Early Head Start-Child Care Partnership programs. The survey's responses can inform how OHS's T/TA System can be more responsive to Head Start grantees' needs and improve the T/TA provided through its National Centers, regional-level T/TA providers, and the Early Childhood Learning and Knowledge Center (ECLKC) website.