O'Riordan's funeral at Glasnevin Crematorium was attended by over a thousand mourners. Following a wake the previous night at Finglas Rd, hundreds turned up outside the house of his son Manus and traffic ground to a halt as family, friends and comrades – many of whom were waving the red flag of the Communist Party of Ireland – escorted O'Riordan to Glasnevin Cemetery. A secular ceremony took place led by Manus O'Riordan (Head of Research at SIPTU) with contributions from O'Riordan's family, Communist Party general secretary Eugene McCartan and IBMT representative Pauline Frasier.