Is Turkey considered an Arab country?

Hardly. Have you looked up the definitions of

Arab?
Turk?

http://www.onelook.com/

yes but 99 of the people in Turkey are Muslim. Is this a significance?

99% of the people in Turkey are Muslim. Is this a significance?

There are also Muslims in France, the USA, England, and many, many other countries in the world. The number of Muslims in a country doesn't determine if it's considered an Arab country or not.

http://www.google.com/#hl=en&source=hp&q=arab+countries+map&aq=1&aqi=g10&oq=arab+coun&fp=40f8c61042dafd58

Arab describes an ethnic group originating on the Arabian peninsula. Although most Arabs follow the religion of Islam and are called Muslim, that isn't true of all Arabs. In addition to the countries listed by Writeacher, the country with the most Muslims is Indonesia, and few if any of them are Arabs.

http://en.wikipedia.org/wiki/Islam_by_country

No, Turkey is not considered an Arab country. The majority of the people in Turkey are ethnically Turkish, and the official language is Turkish, which belongs to the Turkic language family. Although Turkey is a predominantly Muslim country, like many Arab countries, it is not classified as an Arab country.

To find this information, you can use various reliable sources, such as encyclopedias, government websites, or reputable news outlets. These sources will provide accurate and up-to-date information about countries and their respective cultures, languages, and ethnicities.