Allendale, SC is a city located in Allendale County, South Carolina and has a land area of 127.44 square miles (330.07 km2). The water area for the city is 1.40 square miles or 3.63 km2. There is one unique zip code in Allendale, South Carolina and it is 29810. The area code(s) for Allendale is 803.
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