National Stock Yards, IL is a city located in Saint Clair County, Illinois and has a land area of 0.00 square miles (0.00 km2). The water area for the city is 0.00 square miles or 0.00 km2. There is one unique zip code in National Stock Yards, Illinois and it is 62071. The area code(s) for National Stock Yards is 618.
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