Griffith was determined not to alienate fans in either city by naming the team after one city or the other, so his desire was to name the team the "Twin Cities Twins", however MLB objected. Griffith therefore named the team the Minnesota Twins. However, the team was allowed to keep its original "TC" (for Twin Cities) insignia for its caps. The team's logo shows two men, one in a Minneapolis Millers uniform and one in a St. Paul Saints uniform, shaking hands across the Mississippi River. The "TC" remained on the Twins' caps until 1987, when they adopted their current uniforms. By this time, the team felt it was established enough to put an "M" on its cap without having St. Paul fans think it stood for Minneapolis. The "TC" logo was moved to a sleeve on the jerseys, and occasionally appeared as an alternate cap design.

Both the "TC" and "Minnie & Paul" logos remain the team's primary insignia. As of 2010, the "TC" logo has been reinstated on the cap as their logo.