PIRLS (Progress in International Reading Literacy Study) is the fourth assessment in the current trend series, following PIRLS 2001, 2006, and 2011. There were 61 participants in PIRLS 2016, including 50 countries and 11 benchmarking entities (e.g., regions of countries as well as additional grades or language groups from the participating countries) that were assessed to provide comparative data to inform policy. For countries that have participated in a previous assessment since 2001, the PIRLS 2016 results provide an opportunity to evaluate progress in reading achievement across four time points: 2001, 2006, 2011, and 2016. The PIRLS 2016 assessment is based on the PIRLS 2016 Assessment Framework developed collaboratively with the participating countries. The framework is organized around two overarching purposes for reading--for literary experience and to acquire and use information. Four reading comprehension processes are integrated across the purposes: focus on and retrieve explicitly stated information, make straightforward inferences, interpret and integrate ideas and information, and evaluate and critique content and textual elements. This report presents an overview of PIRLS 2016 results. [For the primary report "PIRLS 2016: International Results in Reading," see ED580353. For the "PIRLS 2016 Assessment Framework," see ED545242.]