Arizona Cardinals - Arizona
Atlanta Falcons - Georgia
Baltimore Ravens - Maryland
Buffalo Bills - New York
Carolina Panthers - North Carolina
Cincinnati Bengals - Ohio
Chicago Bears - Illinois
Cleveland Browns - Ohio
Dallas Cowboys - Texas
Denver Broncos - Colorado
Detroit Lions - Michigan
Green Bay Packers - Wisconsin
Houston Texans - Texas
Indianapolis Colts - Indiana
Jacksonville Jaguars - Florida
Kansas City Chiefs - Missouri
Miami Dolphins - Florida
Minnesota Vikings - Minnesota
New England Patriots - Massachusetts
New Orleans Saints - Louisiana
New York Jets - New Jersey
New York Giants - New Jersey
Oakland Raiders - California
Philadelphia Eagles - Pennsylvania
Pittsburgh Steelers - Pennsylvania
San Diego Chargers - California
San Francisco 49ers - California
Seattle Seahawks - Washington
St. Louis/L.A. Rams - Missouri
Tampa Bay Buccaneers - Florida
Tennessee Titans - Tennessee
Washington Redskins - Washington, DC
New Orleans, Louisiana - Saints
Atlanta, Georgia - Falcons
Oakland, California - Raiders
Buffalo, New York (play in Orchard Park) - Bills
Green Bay, Wisconsin - Packers
Chicago, Illinois - Bears
Miami, Florida (play in suburb Miami Gardens) - Dolphins
Cleveland, Ohio - Browns
Seattle, Washington - Seahawks
Denver, Colorado - Broncos
Glendale, Arizona - Cardinals
Detroit, Michigan - Lions
Charlotte, North Carolina - Panthers
Pittsburgh, Pennsylvania - Steelers
San Francisco Bay Area (Santa Clara), California - 49ers
Jacksonville, Florida - Jaguars
Tampa Bay, Florida - Buccaneers
Baltimore, Maryland - Ravens
Minneapolis, Minnesota - Vikings
New England (Maine, Vermont, New Hampshire, Connecticut, Rhode Island, Massachusetts - play in Foxboro, MA) - Patriots
Indianapolis, Indiana - Colts
New York City (play in East Rutherford, New Jersey) - Giants and Jets
Nashville, Tennessee - Titans
Philadelphia, Pennsylvania - Eagles
Houston, Texas - Texans
Kansas City, Missouri - Chiefs
San Diego, California - Chargers
Washington, DC. - Redskins
Dallas, Texas (play in suburb of Arlington) - Cowboys
St. Louis, Missouri - Rams
Cincinnati, Ohio - Bengals
New York
No NFL teams went undefeated in 2009.
There are two NFL teams representing Pennsylvania. You have the Pittsburgh Steelers and the Philadelphia Eagles.
No
The only NFL team in Illinois is the Chicago Bears.
Colts and Saints.
Ohio, Pennsylvania, Texas and Missouri all have two teams each.
green bay and kansas city
There are two teams that play in the state of Ohio. These two teams are The Cleveland Browns and the Cincinnati Bengals. These two teams are very popular in the nfl.
No nfl teams are playing today
32 NFL football teams
This has been true for all twenty of the US metropolitan areas with the largest populations; some of which have had TWO NFL and MLB teams at the same time.