Bagan Dalam (GPS: 5.39264, 100.36991) is a place within the town of Butterworth south of New Ferry Road and Chain Ferry Road, next to the Butterworth Deepwater Wharf. It takes its name after Kampung Bagan Dalam located in that area. The main road in that area is also called Jalan Bagan Dalam. Bagan Dalam probably got its name from piers along the Prai River. These are "inland piers" compared to those jutting out into the open sea at Bagan Luar.
Bagan Dalam is bordered by Jalan Chain Ferry to the north, the Prai River to the south and the sea to the west. It is the area north of the Prai River from the town of Prai.
Bagan Dalam has always been Butterworth's transportation hub. It is the location of Pengkalan Sultan Abdul Halim, the ferry terminal, and since 22 November, 2018, Penang Sentral is the new transportation hub for the state.