Letterfrack was founded by people trying to do good in catastrophic times. James and Mary Ellis were Quakers from Bradford, England. During the Great Famine they came west to Connemara, and in 1849 - the year that killed more Irish people than any other - James became the resident landlord of Letterfrack. They leased nearly a thousand acres of rough land, set about farming it, and started planting woodland in country that had been deforested for centuries. They built a schoolhouse, housing for tradesmen, a shop, a dispensary, and a temperance hotel. The Quaker famine relief effort across Ireland was remembered with quiet gratitude long after better-known charitable organizations had moved on. The Ellises stayed for eight years. In 1857 they sold the property to John Hall, a staunch Protestant. The transition began.

Hall ran the property in support of the Irish Church Missions, an evangelical organization seeking to convert Irish Catholics to Protestantism. After twenty-five years of limited success, he put the property up for sale in 1882. The Catholic Archbishop of Tuam, John McEvilly, wanted it for the Church. McEvilly used a false name in the sale, knowing Hall would not knowingly sell to a Catholic prelate. The transaction completed in 1882 - £3,000 for 1,000 acres. In 1885 McEvilly established St Joseph's Industrial School, Letterfrack, in the buildings, run by the Irish Christian Brothers. Industrial schools were Ireland's institutional answer to poor, neglected, and so-called 'delinquent' children, funded by the state, run by religious orders. Boys committed to St Joseph's were sent for offenses as minor as truancy or as serious as petty theft. They typically arrived between ages eight and twelve and remained until sixteen.

Between 1885 and its closure in 1974, hundreds of boys passed through St Joseph's. The 2009 Ryan Report - the official Commission to Inquire into Child Abuse - devoted Chapter 8 to Letterfrack. It documented sustained physical, emotional, and sexual abuse over decades, conditions of cold, hunger, and isolation, and a culture of secrecy that protected perpetrators while breaking children. The former resident Peter Tyrrell's memoir Founded on Fear, published posthumously, became one of the most-quoted testimonies in Irish writing about industrial schools - Tyrrell took his own life in London in 1967, having spent decades trying to make Irish institutions answer for what he survived. A boys' graveyard on the grounds holds the bodies of children who died at the school. The village today carries the weight of that history honestly. The site is no longer a place to hide from. It is a place where the dead are remembered, where Connemara West runs a community-driven economy, and where the future is being built carefully and out loud.

Letterfrack has a stranger chapter in its history too. When Marconi expanded his transatlantic wireless operations to add duplex service - simultaneous two-way communication - he chose St Joseph's Industrial School in Letterfrack as the receiver site, complementing the transmitter at Clifden. From April 1911, eastbound messages from Marconi Towers in Nova Scotia were received here while westbound messages were sent from Clifden. Marconi's engineers developed the duplex technique using a balanced Carborundum detector connected to a drop wire suspended between Diamond Hill and Mweelin. Duplex communication soon became the global standard. The Letterfrack station was moved to Currywongaun in 1913 and closed in April 1917. The technology born here continued. The school continued for another fifty-seven years.

The St Joseph's Industrial School closed in 1974. In 1987 the community organization Connemara West began running furniture courses in the buildings, which evolved into the Furniture College of what is now the Atlantic Technological University - a campus designed by William Hague in 1887 finding its second purpose. St Joseph's Church, built on the grounds in 1924-26 to the designs of Rudolf Maximilian Butler in Romanesque Revival style, still stands. West Coast United F.C., the village football club, was founded in 1984 and runs senior, over-40s, and youth teams. Connemara Community Radio broadcasts from here. The village is the visitor center for Connemara National Park, the gateway for the climb up Diamond Hill, and the headquarters for a community that has chosen to do the slow work of building a future on top of an honest reckoning with the past.