Flag of the City of Toledo, Ohio, United States. Public domain, as flags of local government entities in the United States are not eligible for copyright; moreover, this flag was published in the United States prior to 1977 without a copyright notice.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.