As well as the annual parades in Belfast and Ballymena, parades will be held in towns including Ballinamallard, Magherafelt and Kilkeel.
A demonstration will also be held in Bangor.
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Annual 12th July Orange Order Belfast parade takes place in the City Centre starting at Carlisle Circus. The parade at Carlisle Circus in north Belfast. Photo by Jonathan Porter / Press Eye.Photo: presseye