The National City Zip Code is 91950, 91951. If you want to send a mail to National City City, you should use the 91950, 91951 Zip Code. In 1983, the U.S. Postal Service introduced an expanded National City ZIP code system that it called ZIP+4, often called "plus-four codes", "add-on codes", or "add ons".How far is National City from San Diego CA?
Driving distance from San Diego, CA to National City, CA. The total driving distance from San Diego, CA to National City, CA is 6 miles or 10 kilometers. Your trip begins in San Diego, California. It ends in National City, California.What is the number of counties in California?
List of counties in California. The U.S. state of California is divided into 58 counties. The region was first divided into twenty-seven counties on February 18, 1850.