Thomas John Shannon (9 December 1884 – 9 June 1954) was an Australian real estate agent, alderman and state politician.

[1][2] Shannon was born in Redfern, New South Wales and was the son of a cab driver.

He was educated to elementary level at St Benedict's, Broadway and worked as a grocer's boy and eventually as a real estate agent.

He became involved with community organisations including the Hibernian Australian Catholic Benefit Society, a provider of social security insurance, and was elected as an Alderman on Sydney City Council between 1921 and 1927 and between 1930 and 1948.

[3] He retained the seat for Labor at the next 8 elections and died as the sitting member in 1954.