Edward Clark (April 1, 1815 - May 4, 1880) was an American politician in the mid 19th century in the state of Texas and Confederate soldier during the American Civil War. From 1859 to 1861 he served as the state's lieutenant governor, and succeeded to the governorship on March 18, 1861 when incumbent Governor Sam Houston refused to take the oath of allegiance to the Confederate States of America and thus (according to the state's secession convention, a body of dubious legality) forfeited the office.