Each US state has its own age of consent. State laws set the age of consent at 16, 17 or 18. The most common age is 16
age of consent 16 (32): Alabama, Alaska, Arkansas, Connecticut, District of Columbia, Georgia, Hawaii, Indiana, Iowa, Kansas, Kentucky, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Montana, Nevada, New Hampshire, New Jersey, North Carolina, Ohio, Oklahoma, Pennsylvania, Rhode Island, South Carolina, South Dakota, Utah, Vermont, Washington, West Virginia
age of consent 17 (9): Colorado, Illinois, Missouri, Nebraska, New Mexico, New York, Texas, Wyoming, Louisiana (as of april 1st 2014
http://www.age-of-consent.info/states/Louisiana)
age of consent 18 (10): Arizona, California, Delaware, Idaho, North Dakota, Oregon, Tennessee, Virginia, Wisconsin, Florida1
The Federal government has a legal age of consent of 18. Federal law, however, applies only to sexual acts that involve travel between different states, countries, or on federal property