Add the chickpeas, cucumber, tomatoes, parsley, red onion, olive oil, lemon zest, lemon juice, grated garlic, oregano, salt, and pepper to a large mixing bowl.
Mix everything together until the vegetables and chickpeas are evenly coated in the lemon dressing.
Let the salad sit for at least 10 minutes before serving. This helps the chickpeas soak up the dressing and brings the flavors together.