Bolesław of Dobrzyń (pl: Boleslaw dobrzyński; betw. 1303/06 - 1 October 1327/12 March 1329, most probably in 1328), was a Polish prince, member of the House of Piast. He was Duke of Dobrzyń during 1312-1327 (until 1316 under the regency of his mother and since them under the tutelage of his oldest brother) and Duke of Łęczyca since 1327 jointly with his brother. He was the fourth or second son of Siemowit of Dobrzyń and Anastasia, daughter of Leo I of Halych-Peremyshl. It's unknown after whom he was named; probably was in honour to Bolesław II of Płock, his father's cousin.