Floriano (locally [flʌɾiɐ̃nu]) is a Brazilian municipality in the state of Piauí.

Cerrado is the region's predominant vegetation, however there are places where there is a blend of caatinga as well.

Because of its location in the state's interior region, Floriano shows a semi-arid tropical climate.

The temperature stays between 29°C and 37°C and rainfall is scarcer than the northern region of the state - with a dry period that lasts six months.

The Parnaíba River is the main body of water in Floriano, separating it from its neighbor city Barão de Grajaú, in the state of Maranhão.