I am a US citizen living abroad, can I sponsor my wife for her Green Card?

You essentially have to go through the same process that you would in the United States.
Some embassies will allow you to go through the process there if you have resided in that country for a certain period of time.
Some countries have immigration offices to assist with the process, for example it is not uncommon in London, Rome, and India to do so.

What Happens If My Green Card Application Is Denied?
You may have never put so much effort into something as your green card application, because of how earnest you are to become a permanent resident of the United States. This is why your spirits may be crushed when you hear back from the United States Citizenship and Immigration Services…
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Can I Work in the U.S. with a Tourist Visa?
It may have been your lifelong dream to visit the United States. And this may have all come true when you get approved for a B-2 visa, a nonimmigrant visa designated for individuals like you who wish to enter the country temporarily for tourism, pleasure, or visiting. Well, say that…
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What Is an Immigration Petition and How Do I File One?
With the life you lead and the benefits you carry as a United States citizen or lawful permanent resident, you may wish the same for your loved ones still residing in your home country. Well, through your best efforts, you may be able to make this wish into a reality.…
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What Is a National Interest Waiver?
You may encounter many roadblocks between you and your ability to reside legally in the United States. Well, the United States Citizenship and Immigration Services (USCIS) offers certain waivers that may assist you in overcoming these obstacles. Namely, there is such a thing as a national interest waiver. Without further…
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