The largest country by landmass in the world are; 1 Russia, 2 Canada, 3 China, 4 United States, 5 Brazil, 6 Australia, 7 India, 8 Argentina, 9 Kazakhstan, 10 Algeria, 11 Denmark/Greenland, 12 Saudi Arabia, 13 Mexico, 14 Indonesia, and15 Sudan.

The largest country in the world is Russia with a land area of 16,376,870 Km² (6,323,142 mi²), equivalent to 11% of the total world's landmass.

Algeria is a large predominantly Muslim country of North Africa. From the Mediterranean coast, along which most of its people live, Algeria extends southward deep into the heart of the Sahara, a forbidding desert where some of the Earth’s hottest surface temperatures have been recorded and which constitutes more than four-fifths of the country’s area. The Sahara and its extreme climate dominate the country. The contemporary Algerian novelist Assia Djebar has highlighted the environs, calling her country “a dream of sand.”

More Info: en.wikipedia.org