[10] East Arm consists of land associated with a peninsula extending into the harbour and part of the channels of the following waterbodies that bound the peninsula's coastline: Blesser Creek to the north-west, Frances Bay to the west, the channel known as East Arm to the south and Hudson Creek to the south-east.

[12] Filmmaker Steven McGregor grew up near the leprosarium, and his mother used to work there as a health worker.

He said there was no real stigma attached to having leprosy, and the people there were fairly happy, and went fishing and did other activities, but missed their family and homes.

[13] Infrastructure and facilities located within the suburb included the following: In September 2021, a contract was let by the US Department of Defense for Crowley Solutions, a Florida-based logistics company, to build a fuel storage facility for 300 million litres (79×10^6 US gal) at a reported contract cost of A$270m (US$195m).

[18] The 2016 Australian census which was conducted in August 2016 reports that East Arm had 13 people living within its boundaries.