Bartosz Sienkiewicz (born 19 January 2001) is a Polish T38 para athlete.
Sienkiewicz competed at the 2025 World Para Athletics Championships and won a gold medal in the long jump T38 event with a jump of 6.74 metres. He also competed in the 100 metres T38 event and set a European record during the heats with a time of 10.87 seconds. During the finals he finished in sixth place with a time of 11.10 seconds.