List of railway companies

This centralized list resolves information fragmentation of scattered global railway operator records, reducing the lookup effort for users who would otherwise need to navigate separate national transport agency directories. It also clearly separates entries for frontline train operating companies from separate infrastructure management entities (such as the UK's Network Rail) that do not run passenger or freight services directly, eliminating common user confusion between two distinct types of rail sector entities.

Unlike commercial industry directories that only list active operating firms, this Wikipedia catalog preserves full entries for defunct historical railway companies, allowing users to trace full national rail system evolution trajectories, including major restructuring events such as the 1987 breakup of Japan's single state-owned Japanese National Railways into 7 separate regional JR group operating firms.

The entry uses a nested classification structure that groups operators not just by country, but by niche service type: dedicated separate sub-lists exist for narrow-gauge local lines, heritage tourist steam railways, heavy freight-only rail firms, and urban commuter rail operators, making it far more usable for targeted niche research than generic unfiltered company directories.