Which of these counties is NOT included in the Floridian region?

Calhoun County is not included in the Floridian region. The term "Floridian region" typically refers to a geographical area characterized by specific environmental, cultural, and health-related features that are distinct to certain counties in Florida. The counties that are part of this region are typically located in the central and southern parts of the state, where the climate, geography, and public health dynamics align with what is considered "Floridian."

In contrast, Calhoun County is located in the Panhandle region of Florida, which shares a different cultural and environmental context compared to counties that are more central or southern. Therefore, it does not fall under the designation of the Floridian region, highlighting the geographic distinctions that define various areas within Florida.