Adeliia Tigranovna Petrosian (Russian: Аделия Тиграновна Петросян; born 5 June 2007) is a Russian figure skater. She is a 2026 Olympian (2026 Winter Olympics), three-time Russian national champion (2024, 2025, 2026), a three-time Russian Grand Prix Final champion (2023, 2024, 2025), the 2021 ISU Junior Grand Prix in Slovenia champion, the 2021 Russian junior silver medalist, the 2022 Russian national bronze medalist, the ISU Skate to Milano Champion, the 2024 Russian Figure Skating Grand Prix Stage II Kazan Champion, the 2023 Russian Figure Skating Grand Prix Omsk and Ufa Champion, and the 2024 Russian Figure Skating Grand Prix Moscow Champion. She went undefeated in all domestic skating competitions during the 2023–2024 and the 2024–2025 seasons.

She competed at the 2026 Winter Olympics as an Individual Neutral Athlete (AIN).

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