| Year | Organizations | Category | Nominated work | Result |
| 1985 | Golden Globes Awards | Best Performance by an Actor in a Miniseries or Motion Picture Made for Television | Reilly: Ace of Spies | Nominated |
| 1989 | AACTA Awards | Best Actor in a Leading Role | Evil Angels / A Cry in the Dark | Won |
| AFI - Australian Film Institute | Best Actor in a Lead Role | Won |
| 1991 | Death in Brunswick | Nominated |
| 1992 | Golden Globes Awards | Best Performance by an Actor in a Miniseries or Motion Picture Made for Television | One Against the Wind | Nominated |
| 1993 | AFI - Australian Film Institute | Best Actor in a Supporting Role | The Piano | Nominated |
| American Television Awards | Best Actor in a Miniseries | Family Pictures | Nominated |
| Academy of Science Fiction, Fantasy & Horror Films | Best Supporting Actor | Memoirs of an Invisible Man | Nominated |
| 1998 | Online Film & Television Awards | Best Actor in a Motion Picture or Miniseries | Merlin | Nominated |
| Primetime Emmy Awards | Outstanding Lead Actor in a Miniseries or a Movie | Nominated |
| Fangoria Chainsaw Awards | Best Actor | Event Horizon | Nominated |
| 1999 | Golden Globes Awards | Best Performance by an Actor in a Miniseries or Motion Picture Made for Television | Merlin | Nominated |
| Blockbuster Entertainment Awards | Favourite Supporting Actor - Drama/Romance | The Horse Whisperer | Nominated |
| 2000 | AFI - Australian Film Institute | Best Performance by an Actor in a Supporting Role | My Mother Frank | Nominated |
| 2001 | Ft. Lauderdale International Film Festival | Best Actor | The Zookeeper | Won |
| Film Critics Circle of Australia Awards | Best Actor - Male | The Dish | Nominated |
| 2004 | AFI - Australian Film Institute | Best Telefeature or Mini-Series | The Brush-Off | Nominated |
| Best Direction in Television | Nominated |
| Best Actor in a Leading Role in a Television Drama or Comedy | Jessica | Nominated |
| 2005 | Logie Awards | TV Week Silver Logie For Most Outstanding Actor | Won |
| Most Outstanding Mini-Series / Telemovie | The Brush-Off | Nominated |
| New Zealand Screen Awards | Performance by an Actor in a Leading Role | Perfect Strangers | Nominated |
| Film Critics Circle of Australia Awards | Best Actor in a Supporting Role | Little Fish | Nominated |
| 2006 | Academy of Science Fiction, Fantasy & Horror Films | Best Supporting Actor on Television | The Triangle | Nominated |
| 2008 | Gemini Awards | Best Performance by an Actor in a Featured Supporting Role in a Dramatic Series | The Tudors | Nominated |
| Monte-Carlo TV Festival | Outstanding Actor - Drama Series | Nominated |
| 2009 | New Zealand Film and TV Awards / Qantas Film and Television Awards | Best Lead Actor in a Feature Film | Dean Spanley | Nominated |
| 2010 | Best Supporting Actor in a Feature Film | Under the Mountain | Nominated |
| New Zealand Screen Awards | Best New Zealand Export | | Won |
| 2012 | Film Critics Circle of Australia Awards | Best Actor - Supporting Role | The Hunter | Nominated |
| AACTA Awards | Best Supporting Actor | Nominated |
| 2016 | The Daughter | Nominated |
| Logie Awards | Most Outstanding Actor | House of Hancock | Nominated |
| Australian Movie Convention | AIMC Lifetime Achievement Award | | Won |
| Film Club's The Lost Weekend Awards | Best Supporting Actor | Hunt for the Wilderpeople | Won |
| 2017 | New Zealand Film and TV Awards / Rialto Channel New Zealand Film Awards | Won |
| NCFCA Awards | Nominated |
| Primetime Emmy Awards | Outstanding Narrator | New Zealand: Earth's Mythical Islands | Nominated |
| Film Critics Circle of Australia Awards | Best Actor - Supporting Role | The Daughter | Nominated |
| AFCA Awards | Best Supporting Actor | Won |
| 2019 | Sweet Country | Won |
| Film Critics Circle of Australia Awards | Best Actor - Supporting Role | Nominated |
| New Zealand Television Awards - Huawei Mate30 Pro | Best Presenter: Entertainment | Uncharted / The Pacific: In The Wake of Captain Cook with Sam Neill | Won |
| AACTA Awards | Longford Lyell Award | | Won |
| The Equity Ensemble Awards | Equity New Zealand Lifetime Achievement Award | Won |
| Sitges - Catalonian International Film Festival | Grand Honorary Award | Won |
| 2020 | AFCA Awards | Best Supporting Actor | Ride Like a Girl | Nominated |
| AACTA Awards | Best Lead Actor | Rams | Nominated |
| 2022 | Best Lead Actor In A Drama | The Twelve | Nominated |