James Clemens

James Clemens may refer to:
 * James Clemens (lord mayor), English merchant and shipowner, Lord Mayor of Liverpool, 1775–76
 * James Clemens, pen name of author James Paul Czajkowski (born 1961), who also uses the pen name James Rollins
 * James Clemens Jr. (1791–1878), American businessman
 * James Brackenridge Clemens (1825–1867), American entomologist
 * James T. Clemens (born 1943), American theoretical physicist