Paul Boyton (often misspelled Boynton) (b. June 29, 1848 in Rathangan, County Kildare, Ireland — April 19, 1924), known as the Fearless Frogman, was a showman and adventurer some credit as having spurred worldwide interest in water sports as a hobby, particularly open-water swimming. Boyton, whose birthplace is variously listed as Dublin or Pittsburgh, Pennsylvania, is best known for his water stunts that captivated the world, including crossing the English Channel in a novel rubber suit that functioned similarly to a kayak.
Boyton attended Saint Francis University, Loretto, Pennsylvania.  Boyton, eager for adventure at a young age, reportedly joined the Union Navy during the American Civil War when he was 15, and in his young adulthood served stints with Benito Juárez's Mexican Navy and the French Franc-tireurs during the Franco-Prussian War. He eventually returned to the United States and helped organize the United States Life-Saving Service, one of the precursors to the modern-day United States Coast Guard. He was later appointed captain of Atlantic City, New Jersey's lifesaving service.
While in Atlantic City, Boyton began toying with a rubber suit invented by C. S. Merriman as a life-saving device for steamship passengers. This first immersion suit, which would become Boyton's trademark, was essentially a pair of rubber pants and shirt cinched tight at the waist. Within the suit were air pockets the wearer could inflate at will using tubes. Similar to modern-day drysuits, the suit also kept its wearer dry. This essentially allowed the wearer to float on his back, using a double-sided paddle to propel himself, feet-forward.
Boyton made numerous expeditions in this suit, swimming up and down rivers across America and Europe to publicize its uses. Boyton would tow a small boat behind him in which he carried his supplies and personal possessions, and sometimes invited newspaper reporters to accompany him. A canny publicist, Boyton's arrival in small river towns was often heralded by great fanfare.
Among his exploits were: crossed English channel in 24 hours (1875); paddled Rhine 430 miles (1875); Alton, Ill. to St. Louis, Mo. on the Mississippi (1876) and same year Bayou Goula to New Orleans, 100 miles in 24 hours; 400 miles on the Danube insix days (1876); navigated all important rivers of the continent, passed through canals of Venice and crossed the straits of Gibraltar; returned to the U.S. and floated from Oil City, Pa. to the Gulf of Mexico-2,342 miles in 80 days. His longest voyage was in 1881 when he started at Cedar Creek, Mont. and ended at St. Louis, Mo., 3,580 miles.
An active Freemason he Raised in Lodge of Friendship No. 206, London, England on May 21, 1875.
In 1885, Boyton was involved in the fatal leap from Brooklyn Bridge of Robert Emmet Odlum, brother of women's rights activist Charlotte Odlum Smith. Catherine Odlum, mother of Robert and Charlotte, blamed Boyton for her son's death. Boyton wrote Mrs. Odlum a letter disclaiming responsibility, which he also published in The New York Times and other periodicals. Mrs. Odlum subsequently traveled to New York City to see Boyton. According to her account, Boyton sent two men to see her who claimed to be a lawyer and a judge, and who warned her not to say anything against Boyton to avoid prosecution for slander. Catherine Odlum claimed in the biography she wrote of her son that Boyton hid or destroyed letters and telegrams from himself to Robert Odlum urging him to travel to New York and make the Brooklyn Bridge jump.
Boyton formed an aquatic circus and toured for several years. In 1894, he opened the first "permanent" amusement park (Paul Boyton's Water Chutes) in Chicago, which was also the first park of any type to charge an admission. The following year, he bought 16 acres (65,000 m2) of land and opened the Sea Lion Park on Coney Island in 1895, fenced the property and charged admission. It would later become Coney Island Amusement Park. Boyton and his sea lions also performed in silent films including Feeding Sea Lions.
In 1902, Boyton sold Sea Lion Park to Frederick Thompson and Elmer Dundy, who redesigned the park and renamed it Luna Park, the first of many of that name to come. Paul Boyton's Water Chutes was permanently closed in 1908, a casualty of increased competition from White City amusement parks, Electric Parks, and Luna Parks that arose in the dozen-plus years after the World's Columbian Exposition.
Paul Boyton is a member of the International Swimming Hall of Fame. 
- Boyton, Paul. "The story of Paul Boyton. Voyages on All the Great Rivers of the World": 13 and Sullivan, Colleen. "Captain Paul Boyton Roughing It In Rubber": 10.
- Irving, Joseph (1879). "Captain Boyton". The Annals of Our Time from March 20, 1874, to the Occupation of Cyprus. London: Macmillan. p. 24.
- Catherine Odlum (1885). The Life and Adventures of Prof. Robert Emmet Odlum, Containing an Account of his Splendid Natatorium at the National Capital. Gray and Clarkson.
- "Odlum's Fatal Leap". The New York Times. June 7, 1885. p. 1. Retrieved 2011-06-25.
- Stanley, Autumn (2009). Raising More Hell and Fewer Dahlias: The Public Life of Charlotte Smith, 1840-1917, Bethlehem: Lehigh University Press. ISBN 978-0-934223-99-7
- Story of Paul Boyton (1892)
- The Story of Paul Boyton by Paul Boyton at Project Gutenberg from Project Gutenberg.
- Letters of Paul Boyton
- Paul BOYTON's Chronology from the New York Times archives by M. LOPEZ
- Coney Island - Sea Lion Park
- Captain Paul Boyton blog (author of Roughing it in Rubber)
- Patent of Clark S. Merriman's inflatable floatation suit