[3] On 12 June, the club announced the departures of Frank Ross, development squad players Sam Jackson, Luc Bollan, Lloyd Robertson, Sebastian Ross, Jack Chesser, Sean Linden and Chris Antoniazzi, David Dangana and youth players Kieran Shanks and Kyle Dalling.
[5] On 17 June, Aberdeen's qualification for the Europa League qualifying rounds was confirmed by UEFA with one-off matches to be played.
[7] On 23 June, after his contract expired after three years at Celtic, Irish winger Jonny Hayes rejoined the Dons on a two-year deal.
[10] On 6 July, the Premiership fixtures were published, with the Dons kicking off at home to Rangers live on Sky Sports with the game to be played behind closed doors according to Scottish government guidelines.
[13] On 11 July, Aberdeen played a friendly match against fellow Scottish Premiership side Ross County at Cormack Park with a 2–2 draw and Bruce Anderson scored both goals.
[19] On 31 July, Ryan Edmondson joined from Leeds United on loan and Tommie Hoban signed a contract until January.
[22] The game was later postponed until 20 August and the Livingston match put back twenty-four hours, with manager Derek McInnes and also Scottish Government leader Nicola Sturgeon very critical of the players because of their actions.
[29] Aberdeen got their first win of the season by beating St Johnstone in their second League match after waiting nineteen days with a Ryan Hedges deflected goal.
[31] Aberdeen also learned they would face Faroese side NSÍ Runavík in the first round of Qualifying for the Europa League.
Also chairman Dave Cormack hoped that fans would be allowed back into the stadium as test events with 300 at Kilmarnock and 750 at Motherwell home matches.
[41] 300 fans were allowed in to watch the Dons beat Kilmarnock with Ross McCrorie's first goal for the club separating the sides.
[44] However, the Dons returned home and individual errors cost them in the first half leading to a 3–0 defeat to Motherwell, where also no fans were present due to an increase in Covid numbers.
[45] Three youngsters Connor Power, Luke Turner and Tyler Mykyta joined Highland Football League side Turriff United on loan for the season.
[49] They got back to Premiership action with a 3–0 win against ten-man Ross County with Marley Watkins scoring his first goal for the club.
[54] Gary Woods joined the club on loan from English League Two side Oldham Athletic initially for three months after an injury to back-up goalie Tomas Cerny.
[54] Having made thirty-seven appearances for the club, striker Bruce Anderson left on loan to join Ayr for the season.
[69] They failed to win at Hamilton Academical[70] and were knocked out of the League Cup by St Mirren due to a late error by goalkeeper Joe Lewis.
[75] The Dons form improved and went unbeaten throughout the whole of the month but their final game of the year away to Livingston was postponed due to a frozen pitch.
[95] The following day, striker Sam Cosgrove signed for English Championship club Birmingham City for a rumoured fee of £2,000,000.
[98] Fellow striker Curtis Main left the club and joined English Football League side Shrewsbury Town.
[99] Former Hibernian and Rangers striker Flo Kamberi signed on loan from Swiss Super League side St Gallen, subject to International clearance.
[100] Michael Ruth, Jack MacKenzie, Luke Turner & Conor Power were all recalled from their respective loan spells.
[109] Venezuelan defender Ronald Hernández joined affiliated club Atlanta United for the duration of the MLS Season.
However, the Dons were beaten 3–0 by Dundee United in the following round who put in a "Fantastic performance" to see them knocked out in the Quarter final stages.
Win Draw Loss Postponed Note: Statistics for the delayed 2019–20 Scottish Cup semi-final played on 1 November 2020 are recorded under the 2019–20 Aberdeen F.C.