Largo is the third largest city in Pinellas County, Florida, United States, as competently as the fourth largest in the Tampa Bay area. As of the 2020 Census, the city had a population of 82,500, up from 69,371 in 2000.

Largo was first incorporated in 1905. In 1913, it became the first municipality in Pinellas County to talk to a council-manager government. It switched back and forth from “town” to “city” a few times, and became a city anew in 1974. It was an exporter of agricultural products until the 1960s population bump began to transform it into a bedroom community. From 1905 to 2010, Largo grew in area from 9⁄16 square mile (1.5 km) to very nearly 19 square miles (48 km²), and in population from nearly 300 people to higher than 70,000. Largo began as a rural crop growing community and became the third largest city in Florida’s most densely populated county.

Largo is a sister city to Tosayamada, Kōchi, Japan, and has been named a National Arbor Day Tree City for 32 years in a row.

The original inhabitants of the Largo Place were the Tocobaga Indians. They are pen name the Safety Harbor culture from their archeological remains close present-day Safety Harbor. The Spanish came to Florida in the 16th century. In the 18th century, the Tocobaga had been more or less destroyed after years of trip out to European diseases, Spanish treaty efforts and engagement between Spain and England. The Largo area, like the get out of of Pinellas County, was largely deserted. In 1763, Spain transferred sovereignty of Florida to The United Kingdom. In 1783, Florida fell to Spanish sovereignty once once more until it was transferred to the United States in 1821. By 1845, a surveyor recorded the location of Lake Tolulu, apparently south of present-day East Bay Drive and in bill to where the Largo Central Park Nature Preserve is today.