Anton Elfinger (15 January 1821 – 19 January 1864) was an Austrian physician and illustrator. Son of a pharmacist in Vienna, he trained at the Academy of Fine Arts Vienna, where he was a student of Leopold Kupelwieser (1796-1862). He later studied medicine, earning his medical doctorate in 1845. Elfinger was also a highly regarded cartoonist, and published his work under the pseudonym "Cajetan". His illustrations consisted of a wide array of subjects, including political cartoons.