The purpose of the paper is to discuss the process that determined the national and metropolitan area sample sizes for the 2015 American Housing Survey (AHS) and beyond. The 2015 AHS sample design includes a national sample integrated with metropolitan area samples from the 15 largest metropolitan areas, by population, as of 2013. Other metropolitan area samples will be independent samples. The  integration of the national and metropolitan area samples is discussed in the whitepaper “Metropolitan Area Selection Strategies and Decisions for the 2015 American Housing Survey and Beyond.”