Michael Scott Horton (born 1964) is the J. Gresham Machen Professor of Theology and Apologetics at Westminster Seminary California since 1998, Editor-in-Chief of Modern Reformation (MR) magazine, and President and host of the nationally syndicated radio broadcast, The White Horse Inn. Both Modern Reformation magazine and The White Horse Inn radio broadcast are now entities under the umbrella of White Horse Media, whose offices are located on the campus of Westminster Seminary California.