
Masjid Jamek Sungai Gelugor is an old Malay mosque in Gelugor. It is the village mosque of the Malay settlement of Sungai Gelugor, which is one of the older settlements on the island. source

Masjid Jamek Simpang Enam is a small heritage mosque along jalan Macalister, between the junctions of Lorong Macalister and Jalan Penang. Also called Masjid Jamek Haji Wahab. source


Masjid Terapung or Floating Mosque of Tanjung Bungah is a big Malay mosque built at the bay in Tanjung Bungah. Despite its name, the mosque is not floating, but rather standing on pilings and stilts. Nevertheless it is the first mosque to be built in the sea in Malaysia (other floating mosques in Malaysia have so far been built on lakes).

Masjid Tuan Guru is a newly expanded mosque in the Malay settlement in Tanjung Tokong. It is located along the old Tanjung Tokong Road, directly opposite Heong Sun See Temple. source
Masjid Umar Ibn Al-Khattab, or better known simply as the Bayan Baru Mosque, is the main mosque in the Bayan Baru township in Penang. Masjid Umar Ibn Al-Khattab is located just across the road from the Bayan Baru Market and Bayan Baru Hawker Centre. source

Masjid Wan Chik Ariffin, or Ariff Mosque, is a Malay mosque at Kampung Dodol, off Jalan Perak. source
Penang Hill Mosque, or Masjid Bukit Bendera, is the only mosque on Penang Hill. Erected to the use of Muslims living and working on the hill, the mosque is located at a short distance from the Penang Hill Hindu Temple. The majority of users of the mosque are those working at the stalls near the Penang Hill Railway Station, government servants attached to the post office, and other departments on Penang Hill. source