Cephaloleia affinis is a species of beetle of the family Chrysomelidae. It is found in Bolivia, Brazil (Amazonas, Pará, São Paulo), Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname and Venezuela.
Adults reach a length of about 9âÂÂ10.1 mm. They are reddish-yellow.
The hostplant is unknown, but adults have been collected on Ischnosiphon or Monotagna species and Heliconia stricta.