Drain and rinse the chickpeas under cold water. Pat dry with a kitchen towel for best texture.
Dice the cucumber, halve the cherry tomatoes, thinly slice the red onion, halve the kalamata olives, and chop the fresh parsley.
In a small bowl, whisk together the olive oil, lemon juice, red wine vinegar, minced garlic, dried oregano, salt, and black pepper to make the dressing.
Add the chickpeas, cucumber, tomatoes, red onion, olives, and parsley to a large bowl.
Pour the dressing over the salad and toss gently until all ingredients are evenly coated.
Crumble the feta cheese over the top and give a final gentle toss.
For best flavor, refrigerate for 20–30 minutes before serving. Serve chilled or at room temperature.