Dineen died on 18 April 1916, aged 54, exactly one week before The 1916 Easter Rising. He died due to a cerebral haemorrhage and was buried in Glasnevin Cemetery, County Dublin. Dineen's grave can be located specifically in the St. Paul's section of Glasnevin Cemetery across the Finglas Road. His headstone is written through the Irish language and states the years he served as President and Secretary of the GAA.