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The national obesity rate remains stable but the McAllen metropolitan statistical area is now ranking at the 'fattest' in the United States.

The results of a new Gallup-Healthways poll was released on the website www.livesciene.com on Wednesday morning.

The study of 187 of 190 metropolitan statistical areas in the United States revealed that national obesity rate hovers at 26 percent.

Residents of Boulder, Colorado came out on top as the skinniest city, with just 12.1 percent of residents considered obese.

But the obesity rate for McAllen-Edinburg-Mission, Texas area soared to 38.8 percent making it the fattest in United States.

Overall, Colorado snagged the top spot as the skinniest state in Gallup's 2011 survey of U.S. states.

Top 10 most obese metro areas:

• McAllen-Edinburg-Mission, Texas: 38.8 percent
• Binghamton, N.Y.: 37.6
• Huntington-Ashland, W. Va., Ky., Ohio: 36.0
• Rockford, Ill.: 35.5
• Beaumont-Port Arthur, Texas: 33.8
• Charleston, W. Va.: 33.8
• Lakeland-Winter Haven, Fla.: 33.5
• Topeka, Kans.: 33.3
• Kennewick-Pasco-Richland, Wash.: 33.2
• Reading, Penn.: 32.7

Top 10 ‘skinniest’ metro areas:

• Boulder, Colo.: 12.1 percent
• Bridgeport-Stamford-Norwalk, Conn.: 14.5
• Fort Collins-Loveland, Colo.: 14.6
• Barnstable Town, Mass.: 15.9
• Santa Barbara-Santa Maria-Goleta, Calif.: 16.4
• Naples-Marco Island, Fla.: 16.5
• Trenton-Ewing, N.J.: 16.8
• Provo-Orem, Utah: 17.1
• Colorado Springs, Colo.: 17.4
• San Francisco-Oakland-Fremont, Calif.: 17.5