Utah Code § 78B-3a-104
§ 78B-3a-104. Residence of a business organization.
For purposes of this chapter, the residence of a business organization is: (1) the county where the business organization's principal place of business is located; (2) the county where the business organization's registered office is located if the business organization does not have a principal place of business in the state; or (3) Salt Lake County if the business organization does not have a principal place of business or a registered office in the state.