Yes, Unfortunately..., Evansville, Indiana can Regulate Firearms as Defined below. The Specific Code Section is Indiana Code 35-47-11-2-1.
Chapter 11. Local Regulation of Firearms
Applicability of chapter
Sec. 1. (a) This chapter applies to all units (as defined in IC 36-1-2-23).
(b) This chapter does not affect the validity of an ordinance adopted before, and in effect on, January 1, 1994.
As added by P.L.140-1994, SEC.13. Amended by P.L.90-2010, SEC.8.
Sec. 23. "Unit" means county, municipality, or township.
As added by Acts 1980, P.L.211, SEC.1.
Regulation of firearms by units other than townships
Sec. 2. Notwithstanding IC 36-1-3, a unit may not regulate in any manner the ownership, possession, sale, transfer, or transportation of firearms (as defined in IC 35-47-1-5) or ammunition except as follows:
(1) This chapter does not apply to land, buildings, or other real property owned or administered by a unit, except highways (as defined in IC 8-23-1-23) or public highways (as defined in IC 8-2.1-17-14).
(2) Notwithstanding the limitation in this section, a unit may use the unit's planning and zoning powers under IC 36-7-4 to prohibit the sale of firearms within two hundred (200) feet of a school by a person having a business that did not sell firearms within two hundred (200) feet of a school before April 1, 1994.
As added by P.L.140-1994, SEC.13. Amended by P.L.90-2010, SEC.9.
Relevant Evansville, Indiana Codes which are Authorized under IC 35-47-11-2-1 are: 1. 8.35.130(A), AND 2. 2.45.070(18). [There MAY be more, however; I was Unable to find them.]