蓝卡（英语：blue discharge, blue ticket）是美国旧军制中一种无关荣誉与否的行政退伍令。它自1916年实施，后演变为军方铲除同性恋军人的手段。发放对象也有很大比例为非裔美国人。

蓝卡持有者在遭免职后，仍在平民生活中饱受歧视：他们不得享有美国退伍军人事务部依《退伍军**利法案》所保障的权利；在就业方面，也因为雇主知道蓝卡的负面意义而处处碰壁。于是改革声浪四起，而鉴于持有者中极高比例为非裔美国人，蓝卡制度尤其受到黑人族群的激烈批评。在舆论的强烈抨击下，美国国会在1947年废止蓝卡制度，以「普通」和「非荣誉」两种级别的退伍令取代。

A blue discharge (also known as a "blue ticket") was a form of administrative military discharge formerly issued by the United States beginning in 1916. It was neither honorable nor dishonorable. The blue ticket became the discharge of choice for commanders seeking to remove homosexual service members from the ranks. They were also issued disproportionately to African Americans.