'''50 series''' may refer to:
== Electronics ==
* HP 49/50 series, a type of graphing calculator made by Hewlett-Packard * Nvidia GeForce RTX 50 series, a series of graphic cards
== Trains ==
* 1–50 series (CTA), a retired subway car type for the Chicago Transit Authority * EMD SD50, also known as "50 series", a North American diesel locomotive type made by Electro-Motive Diesel * Kyoto Municipal Subway 50 series operating for the Kyoto Municipal Subway
== Trucks ==
* Dodge 50 Series, a box truck model operating in Europe
== See also ==
* Detroit Diesel Series 50, a diesel engine for heavy-duty vehicles {{Disambiguation}}