The City of Florence is a Statutory City located in Fremont County

Fremont County, Colorado

Fremont County is the thirteenth most populous of the 64 counties of the state of Colorado of the United States. The county is named for explorer and presidential candidate John C. Frémont. The county population was 46,824 at the 2010 census. The county seat is Cañon City. The Cañon City...

, Colorado

Colorado

Colorado is a U.S. state that encompasses much of the Rocky Mountains as well as the northeastern portion of the Colorado Plateau and the western edge of the Great Plains...

, United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. The population was 3,653 at the 2000 census.

ADX Florence

ADX Florence

The United States Penitentiary Administrative Maximum Facility is a supermax prison for men that is located in unincorporated Fremont County, Colorado, United States, south of Florence. It is unofficially known as ADX Florence, Florence ADMAX, Supermax, or The Alcatraz of the Rockies...

, the only federal Supermax

Supermax

Supermax is the name used to describe "control-unit" prisons, or units within prisons, which represent the most secure levels of custody in the prison systems of certain countries...

 prison in the United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

, is located south of Florence in an unincorporated area

Unincorporated area

In law, an unincorporated area is a region of land that is not a part of any municipality.To "incorporate" in this context means to form a municipal corporation, a city, town, or village with its own government. An unincorporated community is usually not subject to or taxed by a municipal government...

 in Fremont County. Florence sits on the same desert lands as Pueblo and Cañon City, the high deserts of southern Colorado.
According to the United States Census Bureau

United States Census Bureau

The United States Census Bureau is the government agency that is responsible for the United States Census. It also gathers other national demographic and economic data...

, the city has a total area of 4.1 square miles (10.6 km²).