Lynch was born in Skearke, County Meath, Ireland and educated at Cormeen National School and Bailieborough Model School, County Cavan. He migrated to Queensland in 1886 and cut railway sleepers near Charleville and then travelled to the Croydon goldfields. In 1888 he started to work on ships operating along the Australian coast and in the South Pacific, eventually qualifying as a marine engineer. He worked as an engineer on a sugar plantation in Fiji and then on the Kalgoorlie goldfields in Western Australia. He helped found and Goldfields and Engine-drivers' Association and was its general secretary from 1897 to 1904. He married Annie Cleary in 1901.[1]
Lynch married Mary Brown in 1933 after being widowed two years earlier. He ran unsuccessfully for the state seat of Geraldton in 1939. He died at Mount Lawley in 1944, survived by his wife and two daughters and a son of his first marriage.[1]