Hachaliah Bailey appears to have established the first circus in the United States after he purchased an African Elephant, which he named "Old Bet", around 1806. With it as his star attraction he formed the Bailey Circus, which also included a trained dog, several pigs, a horse and four wagons. This was the impetus for what in time evolved into the Bailey component of what became the Ringling Bros. and Barnum & Bailey Circus.
P. T. Barnum, who as a boy had worked as a ticket seller for Hachaliah Bailey's show, had run the Barnum's American Museum from New York City since 1841 from the former Scudder's American Museum building. Besides building up the existing exhibits, Barnum brought in animals to add zoo-like elements, and a freak show. During this time, Barnum took the Museum on road tours, named "P.T. Barnum's Grand Traveling American Museum". The Museum burned down in July 1865. Though Barnum attempted to re-establish the Museum at another location in the city, it too burned down in 1868, and Barnum opted to retire from the museum business.
In 1871, Dan Castello and William Cameron Coup persuaded Barnum to come out of retirement as to lend his name, know-how and financial backing to the circus they had already created in Delavan, Wisconsin. The combined show was named "P.T. Barnum's Great Traveling Museum, Menagerie, Caravan, and Hippodrome". As described by Barnum, Castello and Coup "had a show that was truly immense, and combined all the elements of museum, menagerie, variety performance, concert hall, and circus", and considered it to potentially be "the Greatest Show on Earth", which subsequently became part of the circus's name.
Independently of Castello and Coup, James Anthony Bailey had teamed up with James E. Cooper to create the Cooper and Bailey Circus in the 1860s. The Cooper and Bailey Circus became the chief competitor to Barnum's circus. As Bailey's circus was outperforming his, Barnum sought to merge the circuses. The two groups agreed to combine their shows on March 28, 1881. Initially named "P.T. Barnum's Greatest Show On Earth, And The Great London Circus, Sanger's Royal British Menagerie and The Grand International Allied Shows United", it was eventually shortened to "Barnum and Bailey's Circus". Bailey was instrumental in acquiring Jumbo, advertised as the world's largest elephant, for the show. Barnum died in 1891 and Bailey then purchased the circus from his widow. Bailey continued touring the eastern United States until he took his circus to Europe. That tour started on December 27, 1897, and lasted until 1902.
Separately, in 1884, five of the seven Ringling brothers had started a small circus in Baraboo, Wisconsin. This was about the same time that Barnum & Bailey were at the peak of their popularity. Similar to dozens of small circuses that toured the Midwest and the Northeast at the time, the brothers moved their circus from town to town in small animal-drawn caravans. Their circus rapidly grew and they were soon able to move their circus by train, which allowed them to have the largest traveling amusement enterprise of that time. Bailey's European tour gave the Ringling brothers an opportunity to move their show from the Midwest to the eastern seaboard. Faced with the new competition, Bailey took his show west of the Rocky Mountains for the first time in 1905. He died the next year, and the circus was sold to the Ringling Brothers.
The Ringlings purchased the Barnum & Bailey Greatest Show on Earth in 1907 and ran the circuses separately until 1919. By that time, Charles Edward Ringling and John Nicholas Ringling were the only remaining brothers of the five who founded the circus. They decided that it was too difficult to run the two circuses independently, and on March 29, 1919, "Ringling Bros. and Barnum & Bailey Combined Shows" debuted in New York City. The posters declared, "The Ringling Bros. World's Greatest Shows and the Barnum & Bailey Greatest Show on Earth are now combined into one record-breaking giant of all exhibitions." Charles E. Ringling died in 1926, but the circus flourished through the Roaring Twenties.
John Ringling had the circus move its headquarters to Sarasota, Florida in 1927.
In 1929, the American Circus Corporation signed a contract to perform in New York City. John Ringling purchased American Circus, owner of five circuses, for $1.7 million.
In 1938, the circus made a lucrative offer to Frank Buck, a well-known adventurer and animal collector, to tour as their star attraction and to enter the show astride an elephant. He refused to join the American Federation of Actors, stating that he was "a scientist, not an actor." Though there was a threat of a strike if he did not join the union, he maintained that he would not compromise his principles, saying, "Don't get me wrong. I'm with the working man. I worked like a dog once myself. And my heart is with the fellow who works. But I don't want some ... union delegate telling me when to get on and off an elephant." Eventually, the union gave Buck a special dispensation to introduce Gargantua the gorilla without registering as an actor.
The circus suffered during the 1930s due to the Great Depression, but managed to stay in business. After John Nicholas Ringling's death, his nephew, John Ringling North, managed the indebted circus twice, the first from 1937 to 1943. Special dispensation was given to the circus by President Roosevelt to use the rails to operate in 1942, in spite of travel restrictions imposed as a result of World War II. Many of the most famous images from the circus that were published in magazine and posters were captured by American Photographer Maxwell Frederic Coplan, who traveled the world with the circus, capturing its beauty as well as its harsh realities.
North's cousin Robert took over the president of the show in 1943. North resumed the presidency of the circus in 1947.
Many animal welfare and animal rights organizations are opposed to the use of wild animals in circuses. Many of these groups actively campaign against circuses by staging protests outside of venues over alleged animal rights violations. The groups argue that animals used in the circus are subjected to cruel and inhumane treatment during training, harsh conditions during transport, and a general lack of mental and physical stimulation.