Roz Doyle is described as a native of Bloomer, Wisconsin.
The detail appears in the character’s background in Frasier: Roz is originally from Bloomer, a small city in northwestern Wisconsin. Her Midwestern origin helps distinguish her from the more urban and highly polished world surrounding Frasier Crane and the Seattle radio industry.
Roz’s hometown is not usually a major plot point, but it adds texture to her characterization. She is portrayed as worldly, outspoken, and sexually confident, qualities that contrast with assumptions viewers might make about a character from a small Wisconsin community. The show uses those contrasts for comedy without making Bloomer the central setting of an episode.
Bloomer is a real Wisconsin municipality in Chippewa County. It is sometimes confused with better-known Wisconsin cities such as Madison, Green Bay, or Racine, but those are not Roz’s stated hometowns. The reference is part of the character’s biography rather than a claim about Peri Gilpin, who played her.