In what country in the Northern Hemispheres do you find the seaport of Alexandria?

United States?

There may be a seaport named Alexandria in the U.S., but there's a much better known one in Africa.

http://www.worldatlas.com/aatlas/imageh.htm

http://www.lib.utexas.edu/maps/africa/egypt_pol97.jpg

so Egypt as country and Africa as the continent

No, the seaport of Alexandria is not in the United States. Alexandria is located in the Northern Hemisphere, but it is in a different country. To identify the correct country, we can use a world map or an online map service such as Google Maps. Simply search for "Alexandria seaport" or "Alexandria, country." This will provide you with the location of Alexandria and the corresponding country.