Darlington, MD is a city located in Harford County, Maryland and has a land area of 26.67 square miles (69.08 km2). The water area for the city is 2.83 square miles or 7.33 km2. There is one unique zip code in Darlington, Maryland and it is 21034. The area code(s) for Darlington is 443/667/410.
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