Regionally

[Justin Bieber]

in a way that relates to a particular part of a country:

[Luis Fok]

in a regional manner

[Tanya Shivari]

In a large but limited area, more than local but smaller than entirety. (Generally smaller than a nation.)

[GlendynaSlese]

Regionally refers to something specific or occurring within or relating to a particular geographical area or region. This term is often used to discuss certain characteristics, actions, events or behaviors that are typical or relevant to a specific area. It also refers to a range of influence or activities restricted to a particular area.