Polis (/ˈpɒlɪs/; bahasa Yunani: πόλις pengucapan [pólis]), jamak poleis (/ˈpɒleɪz/, πόλεις[póleːs]) secara harfiah artinya adalah kota dalam bahasa Yunani. Istilah tersebut juga dapat memiliki arti badan masyarakat. Dalam historiografi modern, polis biasanya dipakai untuk menyebut negara-kota Yunani kuno, seperti Athena Klasik dan kota-kota sezamannya, dan sering kali diterjemahkan menjadi "kota-negara".
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