Masanaga HATAKEYAMA (1442-June 9, 1493) was a busho (Japanese military commander) and shugo daimyo (shugo, which were Japanese provincial military governors, that became daimyo, which were Japanese feudal lords) in the late Muromachi period.
畠山政長（はたけやままさなが、嘉吉2年（1442年）-明応2年閏4月25日(旧暦)（1493年6月9日））は、室町時代後期の武将・守護大名。