The entry list for the fourth round of the 2026 FIA European Rallycross Championship for RX1 Drivers on July 18-19 at Mondello Park in Ireland looks as follows:
| No. | Driver | Car | Competitor |
|---|---|---|---|
| 2 |  Ollie O’Donovan | Peugeot 208 | Ollie O’Donovan |
| 7 | Patrick O’Donovan | Peugeot 208 | Patrick O’Donovan |
| 8 |  Johan Kristoffersson | VW Polo Mk6 | Kristoffersson Motorsport |
| 10 |  José Oliveira | Peugeot 208 | JMO |
| 13 |  Andreas Bakkerud | Ford Fiesta Mk7 ST | Bergen Motorsport Evolution |
| 18 |  Juha Rytkönen | Hyundai i20 | Set Promotion |
| 20 | Joni Turpeinen | Ford Fiesta Mk7 ST | Set Promotion |
| 24 | Anton Seppä | Škoda Fabia Mk3 | Anton Seppä |
| 25 | Niall Murray | VW Polo Mk5 | Niall Murray |
| 29 |  Fabien Pailler | Renault Mégane Mk4 | Fabien Pailler |
| 30 |  Nils Volland | Audi S1 |  Volland Racing |
| 36 | Casper Jansson | Peugeot 208 | JRS |
| 38 | Mandie August | SEAT Ibiza Mk5 | ALL-INKL.COM Münnich Motorsport |
| 59 | John McCluskey | Honda Civic | John McCluskey |
| 60 | Martin Enlund | Ford Fiesta Mk8 ST | Martin Enlund |
| 67 | Johannes Rafoss | Ford Fiesta Mk8 ST | Johannes Rafoss |
| 70 | Shane Murphy | VW Polo Mk5 | Shane Murphy |
| 72 | Thomas Graham | Ford Focus | Thomas Graham |
| 73 |  Tamás Kárai | Audi S1 | Kárai Motorsport Sportegyesület |
| 77 | René Münnich | SEAT Ibiza Mk5 | ALL-INKL.COM Münnich Motorsport |
| 80 | Gary Donoghue | Honda Civic | Gary Donoghue |
| 95 |  William Carey | Ford Fiesta | William Carey |
| 96 | Ole Christian Veiby | VW Polo Mk6 | Kristoffersson Motorsport |
| 117 | Michael Leonard | Audi S1 | Michael Leonard |
| 177 | Derek Tohill | Peugeot 208 | Derek Tohill |