Here is the list of all Highest Averages in SA20 history:
| # | Player | Team | Matches | Runs | Avg | 100s | 50s |
|---|---|---|---|---|---|---|---|
| 1 | Sherfane Rutherford | Pretoria Capitals | 11 | 334 | 66.80 | 0 | 2 |
| 2 | Dian Forrester | Joburg Super Kings | 11 | 175 | 58.33 | 0 | 1 |
| 3 | Joe Root | Paarl Royals | 8 | 279 | 55.80 | 0 | 3 |
| 4 | Ryan Rickelton | MI Cape Town | 35 | 1349 | 43.52 | 2 | 8 |
| 5 | Leus du Plooy | Joburg Super Kings | 31 | 829 | 39.48 | 0 | 6 |
| 6 | James Coles | Sunrisers Eastern Cape | 7 | 152 | 38.00 | 0 | 1 |
| 7 | Wayne Madsen | Joburg Super Kings | 4 | 76 | 38.00 | 0 | 0 |
| 8 | James Vince | Joburg Super Kings | 7 | 263 | 37.57 | 0 | 2 |
| 9 | David Miller | Paarl Royals | 41 | 897 | 37.38 | 0 | 2 |
| 10 | Jos Buttler | Durban's Super Giants | 31 | 969 | 37.27 | 0 | 8 |
| 11 | Heinrich Klaasen | Durban's Super Giants | 42 | 1146 | 36.97 | 1 | 9 |
| 12 | Tristan Stubbs | Sunrisers Eastern Cape | 48 | 915 | 36.60 | 0 | 4 |
| 13 | Aiden Markram | Durban's Super Giants | 45 | 1276 | 36.46 | 2 | 6 |
| 14 | Keagan Lion-Cachet | Paarl Royals | 8 | 144 | 36.00 | 0 | 0 |
| 15 | Rassie van der Dussen | MI Cape Town | 41 | 1211 | 34.60 | 1 | 5 |
| 16 | Kane Williamson | Durban's Super Giants | 15 | 343 | 34.30 | 0 | 2 |
| 17 | Thomas Kaber | MI Cape Town | 9 | 34 | 34.00 | 0 | 0 |
| 18 | Shubham Ranjane | Joburg Super Kings | 6 | 101 | 33.67 | 0 | 1 |
| 19 | Rubin Hermann | Paarl Royals | 21 | 559 | 32.88 | 0 | 4 |
| 20 | Dewald Brevis | Pretoria Capitals | 44 | 1046 | 32.69 | 1 | 6 |
| 21 | Faf du Plessis | Joburg Super Kings | 40 | 1029 | 32.16 | 1 | 7 |
| 22 | Devon Conway | Durban's Super Giants | 16 | 383 | 31.92 | 0 | 2 |
| 23 | Kusal Mendis | Pretoria Capitals | 7 | 223 | 31.86 | 0 | 1 |
| 24 | Matthew Breetzke | Sunrisers Eastern Cape | 40 | 949 | 31.63 | 0 | 5 |
| 25 | Will Smeed | Pretoria Capitals | 7 | 219 | 31.29 | 0 | 2 |
| 26 | Reeza Hendricks | MI Cape Town | 41 | 872 | 31.14 | 0 | 6 |
| 27 | Ashton Turner | Pretoria Capitals | 2 | 31 | 31.00 | 0 | 0 |
| 28 | Jonny Bairstow | Sunrisers Eastern Cape | 22 | 492 | 30.75 | 0 | 3 |
| 29 | Will Jacks | Pretoria Capitals | 27 | 740 | 29.60 | 1 | 6 |
| 30 | Kieron Pollard | MI Cape Town | 12 | 207 | 29.57 | 0 | 0 |
| 31 | Kyle Verreynne | Paarl Royals | 29 | 591 | 29.55 | 1 | 2 |
| 32 | Karim Janat | MI Cape Town | 4 | 29 | 29.00 | 0 | 0 |
| 33 | Dan Lawrence | Paarl Royals | 8 | 198 | 28.29 | 0 | 1 |
| 34 | Lhuan-dre Pretorius | Paarl Royals | 24 | 621 | 28.23 | 0 | 5 |
| 35 | Delano Potgieter | Paarl Royals | 33 | 280 | 28.00 | 0 | 0 |
| 36 | Tom Abell | Sunrisers Eastern Cape | 23 | 502 | 27.89 | 0 | 4 |
| 37 | Jordan Hermann | Sunrisers Eastern Cape | 42 | 939 | 27.62 | 1 | 4 |
| 38 | Shai Hope | Pretoria Capitals | 12 | 276 | 27.60 | 1 | 0 |
| 39 | Sediqullah Atal | MI Cape Town | 3 | 82 | 27.33 | 0 | 1 |
| 40 | Quinton de Kock | Sunrisers Eastern Cape | 44 | 1033 | 27.18 | 0 | 9 |
| 41 | Andile Simelane | Sunrisers Eastern Cape | 2 | 26 | 26.00 | 0 | 0 |
| 42 | Kwena Maphaka | Durban's Super Giants | 17 | 26 | 26.00 | 0 | 0 |
| 43 | Marco Jansen | Sunrisers Eastern Cape | 47 | 563 | 25.59 | 0 | 3 |
| 44 | JJ Smuts | Durban's Super Giants | 24 | 534 | 25.43 | 0 | 5 |
| 45 | Rahmanullah Gurbaz | Pretoria Capitals | 7 | 151 | 25.17 | 0 | 1 |
| 46 | Jason Holder | Durban's Super Giants | 7 | 75 | 25.00 | 0 | 0 |
| 47 | Duan Jansen | Joburg Super Kings | 9 | 48 | 24.00 | 0 | 0 |
| 48 | Roelof van der Merwe | Sunrisers Eastern Cape | 10 | 24 | 24.00 | 0 | 0 |
| 49 | Bryce Parsons | Pretoria Capitals | 11 | 236 | 23.60 | 0 | 1 |
| 50 | Adam Rossington | Sunrisers Eastern Cape | 12 | 259 | 23.55 | 0 | 2 |
| 51 | Neil Timmers | Joburg Super Kings | 2 | 47 | 23.50 | 0 | 0 |
| 52 | Dawid Malan | Sunrisers Eastern Cape | 10 | 210 | 23.33 | 0 | 2 |
| 53 | Ben McDermott | Durban's Super Giants | 3 | 46 | 23.00 | 0 | 0 |
| 54 | Naveen-ul-Haq | Durban's Super Giants | 17 | 46 | 23.00 | 0 | 0 |
| 55 | Aaron Phangiso | Joburg Super Kings | 7 | 46 | 23.00 | 0 | 0 |
| 56 | Mitchell Van Buuren | Paarl Royals | 26 | 384 | 22.59 | 0 | 1 |
| 57 | Wiaan Mulder | Joburg Super Kings | 43 | 740 | 22.42 | 0 | 3 |
| 58 | Marques Ackerman | Durban's Super Giants | 12 | 201 | 22.33 | 0 | 0 |
| 59 | Donovan Ferreira | Joburg Super Kings | 41 | 555 | 22.20 | 0 | 3 |
| 60 | Grant Roelofsen | MI Cape Town | 10 | 198 | 22.00 | 0 | 2 |
| 61 | Matthew Wade | Joburg Super Kings | 4 | 66 | 22.00 | 0 | 0 |
| 62 | Kyle Mayers | Durban's Super Giants | 8 | 174 | 21.75 | 0 | 0 |
| 63 | Dinesh Karthik | Paarl Royals | 11 | 130 | 21.67 | 0 | 1 |
| 64 | Akeal Hosein | Joburg Super Kings | 11 | 65 | 21.67 | 0 | 0 |
| 65 | Nicholas Pooran | MI Cape Town | 13 | 238 | 21.64 | 0 | 1 |
| 66 | Connor Esterhuizen | Pretoria Capitals | 23 | 385 | 21.39 | 0 | 2 |
| 67 | Eoin Morgan | Paarl Royals | 7 | 128 | 21.33 | 0 | 1 |
| 68 | Dane Vilas | Paarl Royals | 13 | 254 | 21.17 | 0 | 0 |
| 69 | Phil Salt | Pretoria Capitals | 20 | 354 | 20.82 | 0 | 2 |
| 70 | George Linde | MI Cape Town | 40 | 432 | 20.57 | 0 | 1 |
| 71 | David Bedingham | Durban's Super Giants | 15 | 282 | 20.14 | 0 | 0 |
| 72 | Paul Stirling | Paarl Royals | 2 | 40 | 20.00 | 0 | 0 |
| 73 | Codi Yusuf | Pretoria Capitals | 7 | 40 | 20.00 | 0 | 0 |
| 74 | George Garton | Joburg Super Kings | 3 | 20 | 20.00 | 0 | 0 |
| 75 | Sikandar Raza | Paarl Royals | 10 | 118 | 19.67 | 0 | 0 |
| 76 | Marcus Stoinis | Durban's Super Giants | 8 | 118 | 19.67 | 0 | 1 |
| 77 | James Neesham | Pretoria Capitals | 26 | 351 | 19.50 | 0 | 0 |
| 78 | James Fuller | Sunrisers Eastern Cape | 7 | 76 | 19.00 | 0 | 0 |
| 79 | Brydon Carse | Sunrisers Eastern Cape | 9 | 57 | 19.00 | 0 | 0 |
| 80 | Jason Roy | Paarl Royals | 22 | 408 | 18.55 | 0 | 2 |
| 81 | Theunis de Bruyn | Pretoria Capitals | 17 | 295 | 18.44 | 0 | 1 |
| 82 | Moeen Ali | Joburg Super Kings | 17 | 184 | 18.40 | 0 | 0 |
| 83 | Asa Tribe | Paarl Royals | 11 | 164 | 18.22 | 0 | 1 |
| 84 | Patrick Kruger | Sunrisers Eastern Cape | 12 | 72 | 18.00 | 0 | 0 |
| 85 | Wihan Lubbe | Pretoria Capitals | 37 | 533 | 17.77 | 0 | 3 |
| 86 | Bhanuka Rajapaksa | Durban's Super Giants | 2 | 35 | 17.50 | 0 | 0 |
| 87 | Doug Bracewell | Joburg Super Kings | 4 | 35 | 17.50 | 0 | 0 |
| 88 | Tim David | MI Cape Town | 3 | 52 | 17.33 | 0 | 0 |
| 89 | Wayne Parnell | Pretoria Capitals | 17 | 155 | 17.22 | 0 | 0 |
| 90 | Tony de Zorzi | Sunrisers Eastern Cape | 11 | 189 | 17.18 | 0 | 1 |
| 91 | Temba Bavuma | Sunrisers Eastern Cape | 5 | 85 | 17.00 | 0 | 1 |
| 92 | Andile Phehlukwayo | Paarl Royals | 18 | 152 | 16.89 | 0 | 0 |
| 93 | Liam Livingstone | Durban's Super Giants | 17 | 219 | 16.85 | 0 | 0 |
| 94 | Romario Shepherd | Joburg Super Kings | 17 | 151 | 16.78 | 0 | 0 |
| 95 | Michael Pepper | Joburg Super Kings | 3 | 50 | 16.67 | 0 | 0 |
| 96 | Rilee Rossouw | Joburg Super Kings | 32 | 481 | 16.59 | 0 | 2 |
| 97 | Sam Curran | MI Cape Town | 19 | 231 | 16.50 | 0 | 0 |
| 98 | Odean Smith | MI Cape Town | 7 | 66 | 16.50 | 0 | 0 |
| 99 | Keemo Paul | Durban's Super Giants | 14 | 131 | 16.38 | 0 | 0 |
| 100 | Adil Rashid | Pretoria Capitals | 20 | 80 | 16.00 | 0 | 0 |