Mulberry is a city in Polk County, Florida, United States. The population was 3,817 at the 2010 census.
The first white settlers appeared in the Mulberry area in the 1840s.The first industry in the area was logging the longleaf yellow pine which dominated the area. Eventually the settlement grew to include log homes, stores, and saloons. The nearest sheriff and jail was hours away in Bartow and the town resembled a scene from theOld West as mob rule prevailed. Everyone carried a gun and Monday morning was a busy time for the coroner as he dealt with the victims of Saturday night's "troublemakers."The town had no official name, but the railroad which came through town stopped at a mulberry tree to let off passengers and drop off the mail.The old mulberry tree became the de facto meeting place in town, and eventually gave the town its name. Several hangings took place from the mulberry tree. In 1886, phosphate rock was discovered in the Peace River, and the dominant industry went from forestry to mining. The phosphate industry gave the town stability and Mulberry was incorporated in 1901. In 1910 Mulberry's Masonic lodge was established and still is around today.