Alexander Home, 3rd Lord Home (died 1516) was a Scottish soldier and nobleman, Chamberlain of Scotland and Warden of the Eastern March.
Home was the son of Alexander Home, 2nd Lord Home, by Nicholace Ker, a daughter of George Ker of Samuelston. His father was Great Chamberlain to James IV of Scotland from 7 October 1488. Alexander succeeded his father as Lord Home, Chamberlain and Warden of the Eastern and Middle Marches in 1506, and was confirmed in these honours by royal charter in February 1510. In 1507 he bought the lands and burgh of Gordon from the Earl of Huntly.
In August 1513 Home led 3000 Border Horsemen on a raid into England, en route back to Scotland laden with booty, his force was ambushed by William Bulmer of Brancepeth Castle at Milfield, and was routed losing 1000 men and his standard. Home himself escaped but his brother George Home was captured.
A month later, on 9 September, Home's horsemen were part of the Scottish force that fought at the Battle of Flodden. Home and the Earl of Huntly's contingent formed the vanguard of the Scottish Army. Despite the outcome of that day, Home's men defeated the right wing of the English army led by Edmund Howard. Home escaped the slaughter, though leaving many of his kinsmen on the field. He attempted unsuccessfully to recapture the taken Scottish artillery some days later.