The U.S. Census Bureau strives to meet society’s demands for more data at a rapid pace. At the same time, we strive to overcome challenges such as declining response rates and concerns about privacy and confidentiality when collecting information using surveys. Administrative data show great promise for providing accurate data while easing the burden to survey respondents. The Census Bureau is exploring a myriad of uses for administrative and third-party data in the American Community Survey (ACS) program. Potential uses include replacing or supplementing selected survey items with administrative data, combining data sources to expand the number of topics covered, and using administrative data to enhance our editing and imputation procedures. This presentation details the potential uses of administrative data for the ACS, criteria for determining what data are appropriate for use in the ACS program, lessons learned from our research thus far, and some of the challenges to integrating administrative and ACS data.