| 2025 | Water | Dublin Literary Award source ↗ (opens in a new tab) | Longlist · Fiction | |
| 2021 | The Echo Chamber | The Irish Times Best Books of the Year source ↗ (opens in a new tab) | Selection · Books of the Year | |
| 2020 | A Ladder to the Sky | Dublin Literary Award source ↗ (opens in a new tab) | Longlist · Fiction | |
| 2020 | A Traveller at the Gates of Wisdom | The Irish Times Best Books of the Year source ↗ (opens in a new tab) | Selection · Books of the Year | |
| 2019 | The Heart’s Invisible Furies | Dublin Literary Award source ↗ (opens in a new tab) | Longlist · Fiction | |
| 2018 | The Heart's Invisible Furies | Lambda Literary Awards source ↗ (opens in a new tab) | Finalist · Gay Fiction | |
| 2018 | The Heart's Invisible Furies | Andrew Carnegie Medals for Excellence source ↗ (opens in a new tab) | Longlist · Fiction | |
| 2018 | A Ladder to the Sky | Esquire Best Books of the Year source ↗ (opens in a new tab) | Selection · Best Books | |
| 2018 | A Ladder to the Sky: A Novel | Chicago Public Library Best of the Best source ↗ (opens in a new tab) | Selection · Best Books | |
| 2018 | A Ladder to the Sky | The Irish Times Best Books of the Year source ↗ (opens in a new tab) | Selection · Books of the Year | |
| 2018 | A Ladder to the Sky | Washington Post Best Books of the Year source ↗ (opens in a new tab) | Selection · Notable Fiction | |
| 2017 | The Heart's Invisible Furies | Goodreads Choice Awards source ↗ (opens in a new tab) | Nominee · Historical Fiction | |
| 2017 | The Heart's Invisible Furies | The Irish Times Best Books of the Year source ↗ (opens in a new tab) | Selection · Irish fiction | |
| 2017 | The Heart's Invisible Furies | Amazon Editors' Best Books of the Year source ↗ (opens in a new tab) | Selection · Top 10 | |
| 2014 | Stay Where You Are & Then Leave | Chicago Public Library Best of the Best source ↗ (opens in a new tab) | Selection · Best Fiction for Older Readers | |
| 2013 | The Absolutist | Stonewall Book Awards source ↗ (opens in a new tab) | Honor · Literature | |
| 2013 | The Absolutist | Lambda Literary Awards source ↗ (opens in a new tab) | Finalist · Gay Fiction | |
| 2013 | The Absolutist | Dublin Literary Award source ↗ (opens in a new tab) | Longlist · Fiction | |
| 2013 | This House Is Haunted | NPR Books We Love source ↗ (opens in a new tab) | Selection · Books We Love | |
| 2013 | Stay Where You Are and Then Leave | The Irish Times Best Books of the Year source ↗ (opens in a new tab) | Selection · Books of the Year | |
| 2012 | The Absolutist | Amazon Editors' Best Books of the Year source ↗ (opens in a new tab) | Selection · Top 100 | |
| 2011 | Noah Barleywater Runs Away: A Fairytale | Chicago Public Library Best of the Best source ↗ (opens in a new tab) | Selection · Best Fiction for Older Readers | |
| 2008 | The Boy in the Striped Pyjamas | Dublin Literary Award source ↗ (opens in a new tab) | Longlist · Fiction | |
| 2007 | The Boy in the Striped Pyjamas | British Book Awards source ↗ (opens in a new tab) | Shortlist · Children's Book of the Year | |
| 2006 | The Boy in the Striped Pyjamas | The Irish Times Best Books of the Year source ↗ (opens in a new tab) | Selection · Books of the Year | |