Arthur Ernest "Tommy" Armstrong (17 May 1902 – 21 November 1980) was a New Zealand politician of Christchurch and Napier in the North Island and a member of the Labour Party.

[4][5] Armstrong did not mince his words about the labour leadership to a large meeting in Sydenham: "they are ready to cry and shed tears with the unemployed when deputations wait on them, but when asked to do something decent they are found wanting".

[7] Soon after entering parliament he also stood for Mayor of Napier as Labour's candidate, but was heavily defeated by incumbent Bill Hercock.

[1] He later made a comeback to local politics and served another term as a member of the Christchurch City Council from 1962 to 1965, elected on the official Labour Party ticket.

[13] Later, in the 1966 election, he renewed his opposition to Labour and stood as an independent against Mabel Howard (who was also a councillor at the time of his expulsion) in the Sydenham electorate.