According to the Chicago Bears' website, the "C" is a stylized decal and not a font. The classic "C" that represents the Chicago Bears is elongated horizontally in a shape that resembles a wishbone or a horseshoe. Many fans insist the logo is the same "C" used by the Cincinnati Reds. Both logos are custom designs, although the two designs are definitely very similar.
Since the 1940s, the Chicago Bears football team has only used a few different logos. The team's original logo featured a bear running while holding a football. The second logo included a blue bear standing on top of a football. In 1962, the team's logo changed to resemble the signature letter "C" that fans recognize today.