 Catherine Atchison (G) | 2006-01-11 | 2023 | Boston Jr. Eagles 16U Maroon | 16U AAA (W) |  |
| Jadon Atchison (G) | 2006-12-22 | 2024 | Cincinnati Jr. Cyclones | USPHL Premier | |
 Thomas Atchison (F) | 2000-00-00 | 2017 | Collège Français Sélects M18 AA | QM18AA | |
 Esteban Atencia (D) | 2005-08-25 | 2026 | Meudon U20 | France U20 2 | |
 Tor Aterius (LW/RW) | 2003-08-18 | 2025 | Virserums SGF | Division 3 | |
 Berk Ates (D) | 2004-11-01 | 2026 | Amsterdam Tigers | Netherlands2 | |
| Matthew Atherley (F) | 2011-10-14 | 2026 | STAR Hockey Academy 14U AAA | 14U AAA | |
| Aeneas Atienza-Washington (F) | 2009-11-20 | 2026 | Golden State Eagles 16U AA 1 | 16U AA | |
 Jack Atkin (G) | 2010-05-13 | 2026 | Widnes Wild U19 | England U19 2 | |
| Grant Atkins (D) | 2009-06-19 | 2026 | Blyth Academy Raiders U18 | U18 AAA | |
| Kellan Atkins (C) | 2010-07-08 | 2026 | Carolina Jr. Hurricanes 15U AA 2 | 15U AA | |
| Mitch Atkins (F) | 1994-08-26 | 2026 | Knoxville Ice Bears | SPHL | |
| Ryan Atkins (D) | 2008-03-03 | 2026 | Everest Academy U18 AAA | ONPHL | |
| Griffin Atkinson (D) | 2009-01-08 | 2026 | Westchester Express 16U AAA | 16U AAA | |
| Ozy Atkinson (F) | 2006-04-11 | 2026 | OCN Storm | KJHL | |
| Parker Atkinson (F) | 2005-10-07 | 2026 | Westshore Wolves | VIJHL | |
| Spencer Atkinson (F) | 2010-08-18 | 2026 | Delta Hockey Academy U17 AAA | CSSHL U17 AAA | |
| Tyge Atkinson (F) | 2008-11-09 | 2026 | Lutheran High | USHS-CA | |
| Zakary Atkinson (G) | 2007-12-31 | 2026 | Broad Run High | USHS-VA | |
| Alexander Atsaidis (G) | 1996-04-02 | 2014 | Ontario Hockey Academy U18 | OEHL U18 | |
| Jacob Attarian (D) | 2010-04-06 | 2026 | Lehigh Valley Phantoms 15U AA | AHF 15U | |
| Evan Attea (LW) | 2008-03-25 | 2025 | St. Joseph's Collegiate | USHS-NY | |
| William Attubato (G) | 2011-10-02 | 2026 | Mid Fairfield HC 14U AAA | 14U AAA | |
| Devon Atwal (D) | 2006-12-10 | 2026 | White Rock Whalers | PIJHL | |
| Jasan Atwal (D) | 2010-04-10 | 2026 | Blyth Academy Raiders U16 |  NAPrepHL U16 | |
| William Atwater (F) | 2011-00-00 | 2026 | Syracuse Nationals 14U AAA | 14U AAA | |
| Brian Atwell (D) | 2003-08-21 | 2025 | Ramapo College of New Jersey | AAU II | |
| Ryan Atwell (F) | 2004-05-09 | 2026 | Loyola Marymount Univ. | ACHA III | |
| Vincent Atwell IV (F) | 2004-05-03 | 2024 | Yellowstone Quake | NA3HL | |
| Theo Atzén Larsén (D) | 2011-07-29 | 2026 | Hanhals IF U18 2 | U18 Div.2 | |
| Adam Aubé (D) | 2011-08-10 | 2026 | Laurentides Conquérants M17 AAA | QM17AAA | |
| Philippe-Michel Aubé (F) | 2005-09-29 | 2026 | Mercer Chiefs | NCDC | |
| Rylan Aube (F) | 2009-06-09 | 2026 | Copper Cliff Reds U18 AA | NDMHL | |
| Charles Aubert (F) | 2009-00-00 | 2026 | É. Sec. Pointe-Lévy M18 D1 | RSEQ M18 D1 | |
| Joseph Aubert (D) | 2002-06-18 | 2026 | Lotbinière Mercenaires | LHCS | |
| Brent Aubin (RW/LW) | 1986-06-18 | 2026 | Hannover Indians |  Germany3 | |
| Thomas Aubin (F) | 2008-09-25 | 2026 | Cégep Beauce-Appalaches Condors | QJHL | |
| Jack Aubrey (D) | | 2026 | Winnipeg Bruins U15 AAA | WAAA U15 | |
| Dérick Aubry (C) | 2008-01-20 | 2025 | Gatineau L'Intrépide | QM18AAA | |
| Louis-Félix Aubry (C) | 2007-06-03 | 2026 | Hawkesbury Knights | USPHL Premier | |
| Leon Auburger (G) | 2009-07-02 | 2026 | Pacific Coast Academy U17 AAA | CSSHL U17 AAA | |
| Thomas Aubut (G) | 2010-12-17 | 2026 | École Lucille-Teasdale M15 D1 | RSEQ M15 D1 | |
| Tomas Aubut-Lavin (F) | 2006-09-14 | 2026 | Universel Collège Quebec | NCDC | |
| Thias Auchenberg (F) | | 2026 | Alberta Wolfpack U18 | PHL U18 | |
| Evan Auclair (D) | 2009-09-17 | 2026 | New Jersey Rockets | USPHL Premier | |
| Ethan Aucoin (D) | 2010-12-31 | 2026 | Ohio Blue Jackets 15U AAA | 15U AAA | |
| Parker Aucoin (F) | 2008-00-00 | 2026 | New Hampshire Avalanche 18U AAA | BEAST 18U | |
| Guillaume Audet (D) | 2007-00-00 | 2024 | É. Sec. Beauharnois M18 D1 R | RSEQ M18 D1 R | |
| Jayson Audet (D) | 2007-02-04 | 2026 | Springfield Jr. Pics | NCDC | |
| William Audet (RW) | 2005-09-16 | 2026 | Sherbrooke Phoenix M21 AA | LHC | |
| Ryan Auer (F) | 2006-04-10 | 2024 | Florida Alliance South 18U AAA | 18U AAA | |
| Robert Auerbach (F) | 2009-00-00 | 2026 | Long Island Royals 16U AAA | 16U AAA | |
| Rylan Aufderheide (D) | 2010-03-19 | 2026 | Pittsburgh Penguins Elite 15U | NEPACK 15U | |
| Dominic Auger (D) | 1977-01-12 | 2025 | SCC Berlin | Germany5 | |
| Jaiden Auger (D/C) | 2008-09-03 | 2026 | Victoria Hockey Academy U18 | JPHL U18 | |
 Samuel Auger (G) | 2008-03-17 | 2026 | Genève Future Hockey U18 | Swiss U18-Elit | |
| William Auger (D) | 2006-06-28 | 2026 | Seahawks Hockey | EHL | |
| Renaud Auger-Mongrain (G) | 2007-11-26 | 2026 | Stanstead College Varsity | CPSHA | |
| Grayson Augsberger (D) | 2010-02-16 | 2025 | Hartford Jr. Wolfpack 14U AAA | 14U AAA | |
| Leonardo Augugliaro (G) | 2010-00-00 | 2025 | Connecticut Jr Rangers 14U AAA 2 | THF 14U | |
 Patrik Augusta (LW) | 1969-11-13 | 2006 | Hannover Scorpions | DEL | |
| Anouk Auguste (D) | 2011-07-16 | 2026 | Dunkerque | France2 (W) | |
| Eli Augustine (D) | | 2024 | South Stars Red | USHS-IN | |
| Logan Augustine (LW) | 2002-05-17 | 2023 | Minnesota Outlaws | USPHL Premier | |
| Maximus Augustine (F/D) | 2006-08-10 | 2026 | Kent Koyotes | NBJHL | |
| Ludwig Augustinson (F) | 2010-09-10 | 2026 | Lidingö Vikings U18 | U18 Div.1 | |
| Ryan Augustoni (D) | 2010-06-03 | 2026 | St. Joseph High (Montvale) | USHS-NJ | |
| Sanna Augustsson (D) | 2001-11-18 | 2026 | IF Björklöven | HockeyAllsvenskan (W) | |
| Ville Augustsson (F) | 2011-03-03 | 2026 | Sollentuna HC U16 | U16 Div.1 | |
| Milin Aujla (D) | 2004-01-01 | 2025 | Port Coquitlam Trailblazers | PIJHL | |
| Saajun Aujla (F) | 2010-10-27 | 2026 | Delta Hockey Academy U17 AAA | CSSHL U17 AAA | |
 Andreas Auke-Christensen (D) | 2007-05-18 | 2026 | Frisk Asker U20 | Norway U20 | |
 Joris Aukstakojis (F) | 2008-03-17 | 2026 | Flemingsbergs IK U20 | U20 Region | |
| Tommy Aulbach (F) | 2007-07-30 | 2025 | Pittsburgh Predators 18U AAA | 18U AAA | |
| Brandon Auld (F) | | 2026 | Littleton Hawks 16U AA | AHF 16U | |
| Sam Auld (F) | 2008-01-05 | 2026 | Chilliwack Chiefs | BCHL | |
| Wesley Auld (F) | 2010-00-00 | 2026 | Leonardtown High | USHS-MD | |
| Hugo Aulestiac (F) | 2006-09-09 | 2026 | Red Bank Generals | USPHL Premier | |
| Robert Auletta (D) | 2010-09-14 | 2026 | Boston Hockey Academy 15U AAA | BEAST 15U | |
| Joseph Auletti (G) | 2005-06-21 | 2025 | Minnesota Blue Ox | USPHL Premier | |
| Ina Aulin (LW) | 2008-04-16 | 2026 | Rögle BK U19 | U19 Region (W) | |
| Rylan Aulin (C) | 2008-06-28 | 2026 | Lincoln Stars 18U AAA | NAT1HL 18U | |
| Uriah Aulin (F) | 2011-07-16 | 2026 | Houston Jr. Aeros 14U AA | 14U AA | |
| Spencer Ault (F) | | 2025 | Lehigh Valley Phantoms 14U AA 2 | AHF 14U | |
| Cohen Aultman (F) | 2008-10-11 | 2026 | Lloydminster Bandits | NEAJBHL | |
 Riku Auma-aho (F) | 2001-07-15 | 2026 | KuKi HT | II-divisioona | |
| Ville Auma-aho (F) | 2004-01-17 | 2026 | KuKi HT | II-divisioona | |
| Samuel Aumais (G) | 2008-00-00 | 2026 | Vaudreuil-Dorion Mustangs M18 AA | QM18AA | |
| Owen Aumann (F) | 2010-04-06 | 2026 | Peoria Jr. Rivermen 15U AA | CSDHL 15U | |
| Alexander Aune (F) | 2007-00-00 | 2026 | Gislaveds SK U20 | U20 Div.1 | |
| Baptiste Auneau (C) | 2001-03-28 | 2026 | Reims | France3 | |
 Marsels Aunins (F) | 2008-11-28 | 2026 | Blyth-Deerview Raiders U18 Prep | GLPHL | |
| Wyatt Aurand (F) | 2006-02-03 | 2024 | Corona del Sol High | USHS-AZ | |
| John Luca Auriemma (D) | 2007-03-14 | 2026 | Laval Prime | QJHL | |
| Callum Aus (D/F) | 2007-10-23 | 2026 | Bishop's Univ. | AAU II | |
| Jari Aus (F) | | 2026 | St. Thomas Academy | USHS-MN | |
| Mason Ausmus (D) | 2001-08-26 | 2026 | Concordia Univ. Wisconsin | NCAA III | |
 Nina Ausperger (D/F) | 2000-04-30 | 2026 | Graz99ers Huskies | AWHL (W) | |
| Oda Bruland Austefjord (D) | 2007-05-22 | 2026 | Stavanger Oilers | Norway (W) | |
| Chase Austen (F) | 2010-04-08 | 2026 | Windy City Storm 15U AAA | 15U AAA | |