Zolfo Springs is located at the geographic center of Hardee County, at . U.S. Route 17 runs through the center of town, leading north to Wauchula, the county seat, and south to Arcadia. Florida State Road 64 crosses the northern side of town, leading northeast to Avon Park and west to Bradenton. SR 66 leaves US 17 at the center of Zolfo Springs and leads east to U.S. Route 27 at the south end of Sebring. According to the United States Census Bureau, Zolfo Springs has a total area of, all of it land. The Peace River, which flows south to Punta Gorda, forms part of the northern town boundary. Pioneer Park Lake and Pioneer Park are also inside the town's boundaries.
Demographics
As of the census of 2017, there were 1,816. In 2000 there were 1,641 people, 497 households, and 399 families residing in the town. The population density was 1,086.5 people per square mile. There were 634 housing units at an average density of 419.8 per square mile. The racial makeup of the town was 65.69% White, 3.35% African American, 0.18% Native American, 0.12% Asian, 0.12% Pacific Islander, 29.07% from other races, and 1.46% from two or more races. Hispanic or Latino of any race were 53.63% of the population. There were 497 households, out of which 39.4% had children under the age of 18 living with them, 60.2% were married couplesliving together, 15.1% had a female householder with no husband present, and 19.7% were non-families. 14.9% of all households were made up of individuals, and 9.5% had someone living alone who was 65 years of age or older. The average household size was 3.26 and the average family size was 3.55. In the town, the population was spread out, with 32.3% under the age of 18, 11.2% from 18 to 24, 25.3% from 25 to 44, 16.4% from 45 to 64, and 14.9% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were 102.3 males. For every 100 females age 18 and over, there were 100.2 males. The median income for a household in the town was $25,972, and the median income for a family was $27,188. Males had a median income of $18,603 versus $17,292 for females. The per capita income for the town was $11,397. About 18.7% of families and 27.3% of the population were below the poverty line, including 33.2% of those under age 18 and 18.9% of those age 65 or over.
