Fiat Serbia – formerly "FIAT Automobiles Serbia" (FAS) from 2008 to 2014, then "FCA Serbia" (FCAS) until 2021 – is a Serbian automotive manufacturing company based in Kragujevac, Serbia. It is a joint venture (JV) between the ex-Fiat Chrysler Automobiles (FCA), merged into Stellantis in 2021, which owns 67% of the operation, and the Republic of Serbia, which owns the remainder.

The automotive industry comprises a wide range of companies and organizations involved in the design, development, manufacturing, marketing, selling, repairing, and modification of motor vehicles. It is one of the world's largest industries by revenue.