Bring a pot of salted water to a boil.
Add orzo pasta and cook according to package instructions until al dente.
Drain the orzo and rinse under cold water to cool.
In a large bowl, combine the cooled orzo, cherry tomatoes, cucumber, red onion, and olives.
In a small bowl, whisk together olive oil, red wine vinegar, oregano, salt, and pepper.
Pour the dressing over the salad and toss gently to combine.
Add crumbled feta cheese on top.
Taste and adjust seasoning if necessary.
Refrigerate for at least 30 minutes to allow flavors to meld.
Serve chilled or at room temperature.