This year's parade was concentrated in the Edenderry district, due to the official opening ceremony and dedication of the new arch.
The parade was headed once again by Millar Memorial Flute Band from Belfast. A total of 15 bands and a number of Lambeg drums accompanied the parade which assembled in Watson Street from where it made its way to Seagoe Orange Hall.
From there it returned via Edenderry through the town centre to Mandeville Street, turning into West Street and back to the dispersal point in Watson Street.
Among the large number of visiting Orangemen were Armagh County Grand Master, Dennis Watson, the deputy County Grand Master, Joseph Campbell, and the Upper Bann MP, David Simpson.
Contingents of visiting Orange members included those of two Junior lodges from Scotland - the John Knox Memorial lodge from Edinburgh, and one from Falkirk.
Bands taking part included Portadown True Blues, Portadown Defenders, Upper Bann Fusiliers, Craigavon Protestant Boys (all flute), and Pride of the Birches and Star of David (both accordion).
Among the visiting bands was the impressive Mourne Young Defenders, with others from Banbridge, Mavemacullen, Blackskull and other areas.
Large crowds lined the route, especially in the Edenderry area close to the arch and town centre.
After the parade had ended, many of the marchers attended the opening and dedication of the new Edenderry arch.
The opening ceremony was performed by David Simpson, and the arch was dedicated by the Rev. Stafford Carson, minister of First Portadown Presbyterian Church.
Prayers were led by the Rev Kenneth Elliott, minister of Bethany Free Presbyterian Church.
The platform party included Lord Trimble, former Ulster Unionist leader, Sidney Anderson (Mayor of Craigavon), George Savage, MLA. and Sidney Cairns, the former Mayor, who actually made the new arch.
Ronald Roney, chairman of the arch committee, presided, and a vote of thanks to all who had contributed to the success of the project was proposed by Shirley Branyan, chairperson of Edenderry Community Development Association.
She mentioned the important part played by four men in particular with regard to the construction and erection of the new arch – Trevor Bonis, Adrian Branyan, Kyle Branyan and Jim Edgar.
The arch committee chairman thanked Sidney Cairns who made the arch, Trevor McConnell, who was responsible for the paintwork, Bracken Anderson, for the lettering, and also John Crozier.
Mr Simpson told the crowd that to date £23,500 has been raised through donations and collections, and he appealed for the people of Portadown and district to ensure the target of £30,000 was met.
The new arch replaces one erected and dedicated in 1951, the opening ceremony for that having been performed by the widow of Mr Harry Kane, Royal Navy, who lost his life in the Second World War when his ship was sunk in enemy action.
There has been an Orange arch spanning the roadway in Edenderry during the 'Twelfth' period from the early 1900s.