Apolloniatis ({{IPAc-en|ə|ˌ|p|ɒ|l|ə|ˈ|n|aɪ|ə|t|ə|s}}; "near Apollonia") may refer to several different places in the ancient world:

• A large, shallow lake of ancient Bithynia, the modern Ulubat Gölü in Turkey
• A region about Sittace, also called Sittacene

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