The Morley–Ellenbrook line is an under construction suburban railway line and service in Perth, Western Australia, which will be operated by the Public Transport Authority as part of the Transperth system. The line diverges from the Airport and Midland lines at Bayswater station and heads north-north-west to serve five new stations along a 21-kilometre-long (13 mi) branch to Ellenbrook. Morley–Ellenbrook line services will continue west of Bayswater station to terminate at Perth station in the central business district.

Transperth is the public transport system for Perth and surrounding areas in Western Australia. It is managed by the Public Transport Authority (PTA), a state government organisation, and consists of train, bus and ferry services. Bus operations are contracted out to Swan Transit, Path Transit and Transdev. Ferry operations are contracted out to Captain Cook Cruises. Train operations are done by the PTA through their Transperth Train Operations division.