Pat chicken pieces dry with paper towels to promote crisping.
Cut potatoes into even chunks if using large potatoes; baby potatoes can be used whole for quicker cooking.
In a large mixing bowl, toss chicken and potatoes with olive oil, lemon juice and zest, minced garlic, dried oregano, salt, and pepper until evenly coated.
Preheat air fryer to 400°F (200°C) for optimal heat distribution.
Arrange chicken skin-side up and potatoes evenly in the air fryer basket without overcrowding, in one or two layers.
Air fry for 25-30 minutes, shaking or flipping the basket halfway through to ensure even crisping and browning.
Check the internal temperature of chicken with a meat thermometer; it should reach 165°F (74°C). Potatoes should be tender and golden.
Let chicken rest a few minutes before serving. Garnish with fresh herbs or a squeeze of lemon if desired.