How many different dialects of Arabic are there?

There are some countries that have Arabic as there official language and there are some that do not. That being said Arabic is spoken widely throughout the world. The countries which mainly speak Arabic are found in Africa and the Middle East. The countries that use Arabic as there official language are Algeria, Lebanon, Egypt, Syria, Iraq, Western Sahara, Libya, Djibouti, Somalia, Saudi Arabia, United Arab Emirates, Qatar, Oman, Yemen, Bahrain, Kuwait, Palestine, Israel, Chad, Sudan, Comoros, Jordan, Mauritania, Morocco, Tunisia, and Eritrea. There are 255 million Arabic speakers around the world.