Boleslaus of Masovia

Boleslaus of Masovia may refer to:
 * Boleslaus IV of Poland (1122–1173), Duke of Masovia and Kujavia
 * Boleslaus I of Masovia (1208–1248), of Masovian Piast descent
 * Boleslaus II of Masovia (1251–1313), of Masovian Piast descent
 * Boleslaus George II of Halych (1308–1340), of Masovian Piast descent
 * Boleslaus III of Plock (1322–1351)
 * Boleslaus III of Masovia (1385–1428)
 * Boleslaus IV of Masovia (1421–1454)
 * Boleslaus V of Masovia (died 1488)