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Eastern Conference
Western Conference
Promotion ~ USL (Play Offs: )
1/8-finals
Quarter-finals
Semi-finals
Final
2018 Main
Eastern Conference
| Pl | W | D | L | Diff | Pts | |||
| 1 | FC Cincinnati | 34 | 23 | 8 | 3 | 72:34 | 38 | 77 |
| 2 | Louisville City | 34 | 19 | 9 | 6 | 71:38 | 33 | 66 |
| 3 | Pittsburgh | 34 | 15 | 14 | 5 | 47:26 | 21 | 59 |
| 4 | Charleston | 34 | 14 | 14 | 6 | 47:34 | 13 | 56 |
| 5 | New York Red Bulls 2 | 34 | 13 | 13 | 8 | 71:59 | 12 | 52 |
| 6 | Bethlehem | 34 | 14 | 8 | 12 | 56:41 | 15 | 50 |
| 7 | Indy Eleven | 34 | 13 | 10 | 11 | 45:42 | 3 | 49 |
| 8 | Nashville SC | 34 | 12 | 13 | 9 | 42:31 | 11 | 49 |
| 9 | North Carolina | 34 | 13 | 8 | 13 | 60:50 | 10 | 47 |
| 10 | Ottawa Fury | 34 | 13 | 6 | 15 | 31:43 | -12 | 45 |
| 11 | Charlotte Independ | 34 | 10 | 12 | 12 | 44:57 | -13 | 42 |
| 12 | Tampa Bay | 34 | 11 | 8 | 15 | 44:44 | 0 | 41 |
| 13 | Penn | 34 | 9 | 10 | 15 | 38:47 | -9 | 37 |
| 14 | Atlanta United 2 | 34 | 7 | 10 | 17 | 37:72 | -35 | 31 |
| 15 | Richmond Kickers | 34 | 6 | 4 | 24 | 30:80 | -50 | 22 |
| 16 | Toronto FC II | 34 | 4 | 6 | 24 | 42:77 | -35 | 18 |
Western Conference
| Pl | W | D | L | Diff | Pts | |||
| 1 | Orange County SC | 34 | 20 | 6 | 8 | 70:40 | 30 | 66 |
| 2 | Sacramento Republic | 34 | 19 | 8 | 7 | 47:32 | 15 | 65 |
| 3 | Phoenix Rising | 34 | 19 | 6 | 9 | 63:38 | 25 | 63 |
| 4 | Real Monarchs | 34 | 19 | 3 | 12 | 55:47 | 8 | 60 |
| 5 | Reno | 34 | 16 | 11 | 7 | 56:38 | 18 | 59 |
| 6 | Portland Timbers 2 | 34 | 17 | 4 | 13 | 58:49 | 9 | 55 |
| 7 | Sporting Kansas City II | 34 | 15 | 8 | 11 | 52:53 | -1 | 53 |
| 8 | Saint Louis FC | 34 | 14 | 11 | 9 | 44:38 | 6 | 53 |
| 9 | San Antonio | 34 | 14 | 8 | 12 | 45:48 | -3 | 50 |
| 10 | Oklahoma City Energy | 34 | 12 | 7 | 15 | 43:46 | -3 | 43 |
| 11 | Colorado Springs | 34 | 11 | 6 | 17 | 36:39 | -3 | 39 |
| 12 | Monterey Bay | 34 | 9 | 12 | 13 | 44:38 | 6 | 39 |
| 13 | Rio Grande | 34 | 8 | 14 | 12 | 36:42 | -6 | 38 |
| 14 | LA Galaxy 2 | 34 | 10 | 7 | 17 | 60:67 | -7 | 37 |
| 15 | Las Vegas Lights | 34 | 8 | 7 | 19 | 50:74 | -24 | 31 |
| 16 | Tacoma Defiance | 34 | 6 | 7 | 21 | 40:71 | -31 | 25 |
| 17 | FC Tulsa | 34 | 3 | 12 | 19 | 36:77 | -41 | 21 |
Promotion ~ USL (Play Offs: )
2018 Play Offs
1/8-finals
| 1 | Louisville City | Indy Eleven | 4 : 1 |
| 2 | Pittsburgh | Bethlehem | 2 : 3 |
| 3 | FC Cincinnati | Nashville SC | 2 : 1 |
| 4 | Charleston | New York Red Bulls 2 | 0 : 1 |
| 5 | Orange County SC | Saint Louis FC | 4 : 0 |
| 6 | Real Monarchs | Reno | 0 : 1 |
| 7 | Sporting Kansas City II | Sacramento Republic | 2 : 1 |
| 8 | Portland Timbers 2 | Phoenix Rising | 0 : 3 |
Quarter-finals
| 1 | Louisville City | Bethlehem | 2 : 0 |
| 2 | FC Cincinnati | New York Red Bulls 2 | 0 : 1 |
| 3 | Orange County SC | Reno | 1 : 0 |
| 4 | Sporting Kansas City II | Phoenix Rising | 2 : 4 |
Semi-finals
| 1 | Louisville City | New York Red Bulls 2 | 5 : 1 |
| 2 | Orange County SC | Phoenix Rising | 1 : 2 |
Final
| 1 | Louisville City | Phoenix Rising | 1 : 0 |
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