Justice Lamar may refer to:
Lucius Quintus Cincinnatus Lamar (1825–1893), associate justice of the United States Supreme Court Joseph Rucker Lamar (1857–1916), associate justice of the United States Supreme Court Henry G. Lamar (1798–1861), associate justice of the Supreme Court of Georgia Ann Hannaford Lamar (born 1952), associate justice of the Supreme Court of Mississippi