Bachelor's degrees are important marks of progress for both individuals and society. Compared with noncollege graduates, individuals who hold a bachelor's degree have higher lifetime earnings, lower odds of unemployment, and better health outcomes. This report uses the 2005-2009, 2010-2014, and 2015-2019 American Community Survey (ACS) 5-year estimates to investigate bachelor's degree attainment and presents findings for national- and county-level changes in bachelor's degree attainment. The ACS is the nation's most current, reliable, and accessible data source for local statistics. Since 2010, the ACS has published estimates using 5 years of data for all geographic areas down to the census tract and block-group levels.