James Daniel D'Ianni (1914–2007) was a scientist at the Goodyear Tire & Rubber Company noted for his contributions to the development of synthetic rubber.

D'Ianni spent his career with Goodyear, except for a leave he took in 1946 to serve as chief of the polymer research branch of the Office of Rubber Reserve.

[1] D'Ianni was a member of the American Chemical Society (ACS) and the National Academy of Sciences.

He served as president of ACS in 1980 and as head of its rubber division.

In 1977, the ACS Rubber Division honored D'Ianni with the Charles Goodyear Medal.