Cathal Ó hOisín is a former Irish Sinn Féin politician who was a Member of the Northern Ireland Assembly (MLA) for East Londonderry from 2011 to 2016.

[5] At the 2010 general election, he stood unsuccessfully in East Londonderry, taking second place with 19.3% of the vote.

He unsuccessfully attempted to regain his former seat at the Assembly election the following year.

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