2021 Union Mens Hockey Schedule
| Oct 2 | 4:00 ET |  | Rensselaer | L 2-5 |
| Oct 8 | 7:00 ET |  | @New Hampshire | L 1-4 |
| Oct 9 | 7:00 ET | | @New Hampshire | L 2-3 |
| Oct 15 | 7:00 ET |  | Colorado College | W 2-1 |
| Oct 16 | 7:00 ET | | Colorado College | T 3-3 |
| Oct 22 | 7:00 ET |  | @Lake Superior | L 4-7 |
| Oct 23 | 7:00 ET | | @Lake Superior | L 2-5 |
| Oct 29 | 7:00 ET | | Rensselaer | L 2-4 |
| Oct 30 | 7:00 ET | | @Rensselaer | L 0-3 |
| Nov 5 | 7:00 ET |  | Clarkson | W 4-3 |
| Nov 6 | 7:00 ET |  | St. Lawrence | T 2-2 |
| Nov 12 | 7:00 ET |  | @Cornell | L 1-4 |
| Nov 13 | 3:00 ET |  | @Colgate | W 2-0 |
| Nov 27 | 4:00 ET |  | @Merrimack | W 3-2 |
| Dec 3 | 7:00 ET |  | Princeton | W 1-0 |
| Dec 4 | 7:00 ET |  | Quinnipiac | L 0-4 |
| Dec 10 | 7:30 ET |  | @Maine | T 1-1 |
| Dec 11 | 5:00 ET | | @Maine | L 3-4 |
| Dec 31 | PPD |  | Massachusetts | |
| Jan 1 | PPD | | Massachusetts | |
| Jan 7 | PPD |  | @Dartmouth | |
| Jan 8 | 7:00 ET |  | @Harvard | L 1-4 |
| Jan 14 | 7:00 ET | | @St. Lawrence | W 3-2 |
| Jan 15 | 7:00 ET | | @Clarkson | L 2-8 |
| Jan 21 | 7:00 ET |  | Brown | W 3-1 |
| Jan 22 | 7:00 ET |  | Yale | L 2-3 |
| Jan 26 | 7:00 ET | | @Dartmouth | W 3-2 |
| Jan 29 | 2:00 ET | | @Rensselaer | W 2-0 |
| Feb 1 | LIU | L 1-4 | ||
| Feb 4 | 7:00 ET | | @Quinnipiac | L 1-2 |
| Feb 5 | 7:00 ET | | @Princeton | W 7-3 |
| Feb 11 | 7:00 ET | | Colgate | L 4-6 |
| Feb 12 | 7:00 ET | | Cornell | L 2-5 |
| Feb 18 | 7:00 ET | | @Yale | L 2-3 |
| Feb 19 | 7:00 ET | | @Brown | T 2-2 |
| Feb 25 | 7:00 ET | | Harvard | W 5-3 |
| Feb 26 | 7:00 ET | | Dartmouth | W 3-2 |
| Mar 4 | 7:00 ET | | Princeton | W 3-2 |
| Mar 5 | 4:00 ET | | Princeton | W 5-1 |
| Mar 11 | 7:00 ET | | @Clarkson | L 2-3 |
| Mar 12 | 7:00 ET | | @Clarkson | L 3-4 |