Powerful Women Over 50

07/17/2012 09:28 am ET | Updated Jul 15, 2013

On Monday, Yahoo! named Google veteran Marissa Mayer, 37, president and chief executive officer of the internet giant. She becomes the youngest of a rarified group of female CEOs (there are only 18 in Fortune 500 companies). Mayer had already been named one of the 50 Most Powerful Women in Business by Fortune magazine; at age 33 she was the youngest woman ever included on the list.

To celebrate Mayer's achievement, Huff/Post50 put together a list of powerful women over 50 who inspire us, leaders in business, politics, media and more. Check out our slideshow below for just a sampling of some of the women who are shaping the world, and let us know who inspires you most in the comments.

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