| Club: | Atlanta United 2 |
| Season: | 2021 |
| League: | USL Championship |
| Owner: | Arthur Blank |
| Chrtitle: | President |
| Chairman: | Darren Eales |
| Mgrtitle: | Head coach |
| Manager: | Jack Collison |
| Stadium: | Fifth Third Bank Stadium |
| League Result: | TBD |
| Cup1: | USL Playoffs |
| Highest Attendance: | League/All: 1,421 (6/9 v. SKC) |
| Lowest Attendance: | League/All: 638 (7/7 v. IND) |
| Average Attendance: | |
| Largest Win: | ATL 5–0 TUL (5/19) |
| Largest Loss: | ATL 0–4 BIR (9/22) |
| American: | true |
| Prevseason: | 2020 |
| Nextseason: | 2022 |
The 2021 Atlanta United 2 season was the team's fourth year of existence as well as their fourth season in the USL Championship, the second tier of the American soccer pyramid.
As of August 16, 2021.[1]
The squad of Atlanta United 2 will be composed of an unrestricted number of first-team players on loan to the reserve team, players signed to ATLUTD2, and Atlanta United Academy players. Academy players who appear in matches with ATLUTD2 will retain their college eligibility.
| No. | Pos. | Age | Player | Transferred From | Type | Notes | Date | Source | |
|---|---|---|---|---|---|---|---|---|---|
| 14 | MF | Transfer | December 12, 2020 | [2] | |||||
| 1 | GK | Loan | March 2, 2021 | [3] | |||||
| 8 | MF | Transfer | April 2, 2021 | [4] | |||||
| 19 | FW | Loan | April 2, 2021 | ||||||
| 10 | FW | Transfer | April 2, 2021 | ||||||
| 11 | FW | Loan | April 2, 2021 | ||||||
| 2 | DF | Transfer | Draft Pick | April 21, 2021 | [5] | ||||
| 15 | FW | Transfer | April 23, 2021 | [6] |
| No. | Pos. | Age | Player | Transferred To | Type | Notes | Date | Source |
|---|---|---|---|---|---|---|---|---|
| 3 | DF | Out of Contract | December 4, 2020 | [7] | ||||
| 8 | MF | Free Agent | Option Declined | December 4, 2020 | ||||
| 10 | MF | Free Agent | Out of Contract | December 4, 2020 | ||||
| 11 | MF | Free Agent | Option Declined | December 4, 2020 | ||||
| 14 | MF | Option Declined | December 4, 2020 | |||||
| 23 | GK | Free Agent | Option Declined | December 4, 2020 | ||||
| 31 | DF | Free Agent | Out of Contract | December 4, 2020 | ||||
| 36 | FW | Transfer | January 1, 2021 | [8] | ||||
| 1 | GK | Transfer | March 4, 2021 | [9] | ||||
| 2 | DF | Transfer | April 5, 2021 | [10] | ||||
See main article: 2021 USL Championship season.
| width=30 | Place | width=30 | Position | width=200 | Name | width=75 | width=75 | width=75 | Total | ||
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | DF/MF |  Aiden McFadden | 8 | 0 | 8 | ||||||
| 2 | MF |  Darwin Matheus | 6 | 0 | 6 | ||||||
| FW | Tyler Wolff | 6 | 0 | 6 | |||||||
| 4 | FW | Phillip Goodrum | 4 | 0 | 4 | ||||||
| FW |  Amadou Macky Diop | 4 | 0 | 4 | |||||||
| 5 | FW |  Fernando Matías Benítez | 2 | 0 | 2 | ||||||
| MF | Ajani Fortune | 2 | 0 | 2 | |||||||
| MF | Coleman Gannon | 2 | 0 | 2 | |||||||
| MF | David Mejia | 2 | 0 | 2 | |||||||
| 9 | MF | Chris Allan | 1 | 0 | 1 | ||||||
| MF | Machop Chol | 1 | 0 | 1 | |||||||
| FW | Jackson Conway | 1 | 0 | 1 | |||||||
| MF | Abdoulaye Diop | 1 | 0 | 1 | |||||||
| DF |  Bradley Kamdem Fewo | 1 | 0 | 1 | |||||||
| MF | Robbie Mertz | 1 | 0 | 1 | |||||||
| MF | Danial Sebhatu | 1 | 0 | 1 | |||||||
| MF | Connor Stanley | 1 | 0 | 1 | |||||||
| Total | 44 | 0 | 44 | ||||||||
Numbers after plus-sign(+) denote appearances as a substitute.
|-! colspan=16 style=background:#dcdcdc; text-align:center|Players who have played for Atlanta United 2 this season but have left the club:|-|}