Susan Elaine Eisenhower (born December 31, 1951 in Fort Knox, Kentucky) is a consultant, author, and expert on international security and relations between the Russian Federation and the United States of America. She is the daughter of John Eisenhower, and the granddaughter of President Dwight Eisenhower. She was married to space scientist Roald Sagdeev, formerly the director of the Russian Space Research Institute. Despite the end of the marriage several years ago, they remain friends and business partners.

Susan Eisenhower is President of the Eisenhower Group, Inc, which provides strategic counsel on political, business and public affairs projects. She has consulted for Fortune 100 and Fortune 500 companies doing business in the emerging markets of the former Soviet Union and for a number of major institutions engaged in the energy field.

She is the Chairman of Leadership and Public Policy Programs & Chairman Emeritus of the Eisenhower Institute, a think tank based in Washington, D.C. and in Gettysburg, Pennsylvania part of Gettysburg College. Eisenhower served as the president of the Eisenhower Institute twice, and later as Chairman. During that time, she became known for her work in the former Soviet Union and in the energy field.