Aleksander Doba (9 September 1946 – 22 February 2021) was a Polish kayaker and mountain climber. He was known for his long voyages crossing oceans. In 2010 and again in 2013 he kayaked across the Atlantic Ocean. The two voyages were the longest open-water kayak voyages ever made. He was named 2014 Adventurer of the Year by National Geographic. 