According to the United States Census Bureau, Port Monmouth had a total area of 1. 343 square miles ( 3. 477 km < sup > 2 </ sup >), of which, 1. 302 square miles ( 3. 371 km < sup > 2 </ sup >) of it is land and 0. 041 square miles ( 0. 106 km < sup > 2 </ sup >) of it ( 3. 04 %) is water.

According to the United States Census Bureau, Port Orford has a total area of, of which is land and is water.

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