Theoretical US purchase of the Mexican states of Sonora & Chihuahua If Mexico were to offer to sell to the US their states of Sonora and Chihuahua, would you want the US gov't to accept the offer. And if so, under what conditions? For argument's sake, let's assume both were to be admitted as the 51st and 52nd states. What implications, problems and benefits can you see with this? A little background info: Chihuahua has approx 3.27 million people and a land mass of 95,400 sq miles. Sonora has approx 2.26 million people and a land mass of 71,403 sq miles. Source More info The land mass total is equal to 106,735,920 acres. At a rate of $2,500 an acre that comes out to $266,839,800,000. 266.8 Billion with a "B" dollars. Just to toss out a number so you can see what kind of money would be involved.