Marian Barry (1 October 1871 – 8 September 1921) was an Irish trade unionist.
The couple had four children, and Marian withdrew from political activity until 1906 in order to bring them up.
She founded a branch in Jarrow, where her husband won a by-election, in 1907, a campaign in which Marian was prominent.
She campaigned locally for reforms including free school meals, and was elected to the League's executive in 1908.
Marian relocated to Hackney, where she was active on the local employment exchange.