The purpose of this article is to describe and compare individual state funding systems for public elementary and secondary education in the United States. States' major education funding systems are described as well as funding mechanisms for students with disabilities; English language learners (ELL); gifted and talented students; and low income or "at-risk" students, the latter more broadly defined as those who are at risk of dropping out of school. Third is a description of state funding for vocational, career, and technical education programs, an area that is of particular importance to students who do not plan to pursue postsecondary education. Fourth are funding programs that are generally, but not always, outside the state's major funding system that are district-based. These include state funding related to sparsity and density factors; transportation costs; and infrastructure-related expenses for capital outlay and associated debt. The research reported in this article was based upon a 50-state survey of chief education officers with regard to their respective state's funding system for public elementary and secondary education for the 2014-2015 academic year. As a result, this article presents a comprehensive view of formulas and other mechanisms states employ to fund PK-12 education at present.