Several decisions of the United States Supreme Court on eminent domain and the impact of these decisions were explore. These decisions involved the Fifth Amendment, which provides the legal standard for eminent domain. We reviewed the history of the Court regarding what is "public use" within the Fifth Amendment. Moreover, what the Court interprets as "just compensation" for property taken regarding a "public use" as well as market value were examined. Included in this discussion are intangible as well as tangible property under the Taking Clause. Further discussion includes the landmark cases pertaining to eminent domain, the most recent United States Supreme Court case on eminent domain, and how some states are responding to the United States Supreme Court Kelo ruling.