Units sold in 2008: 158,884*
The best-selling car of its kind in the United States and Japan, the Prius has become synonymous with the word "hybrid," making it a status symbol in the green movement. When it launched in 2000, the Prius was the world's first mass-produced gas-electric hybrid.
Now in its third generation, the popularity of the Prius -- whose gasoline engine and electric battery-powered motor can get up to 51 miles per gallon -- has helped Toyota sell more than one million hybrids in the United States.
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Last updated June 26 2009: 10:49 AM ET
*Source: Ward's Auto