Southwestern Railways (PZZ), (Ukrainian: Південно-Західна залізниця) headquartered in Kyiv, the capital of Ukraine, is a component part of the Ukrzaliznytsia company, its regional branch.

In February 2025, the Commission of the Ukrainian Institute of National Memory Noted that "Southwestern" and "Southern Railways" names are propaganda for Russian imperial policy and violate the law.

In addition such depots also are located in Shepetivka, Darnytsia (left-bank Kyiv), Bakhmach, Vorozhba, Hrechany (neighborhood of Khemlnytskyi), and Snovsk (formerly Shchors).

SWR's route map includes all the railroads in the Kyiv, Zhytomyr, Chernihiv, Vinnytsia, Khmelnytskyi and Sumy oblasts (provinces of Ukraine).

The history of the SWR began on 7 June 1870, when the construction of these railroads was launched and making it the third oldest railway system in Ukraine after Lviv and Odesa.