CDC reports

Iron deficiency is a condition resulting from too little iron in the body. Iron deficiency is the most common nutritional deficiency and the leading cause of anemia in the United States.

http://www.cdc.gov/nutrition/everyone/basics/vitamins/iron.html

Food Source Iron (mg)
Beef, liver 7.5
Beef, corned 2.5
Beef, lean ground; 10% fat 3.9
Beef, round 4.6
Beef, chuck 3.2
Beef, flank 4.3
Chicken, breast w/out bone 0.9
Chicken, leg w/bone 0.7
Chicken, liver 7.3
Chicken, thigh w/ bone 1.2
Cod, broiled 0.8
Flounder, baked 1.2
Pork, lean ham 1.9
Pork, loin chop 3.5
Salmon, pink canned 0.7
Shrimp, 10 - 2 1/2 inch 0.5
Tuna, canned in water 1.0
Turkey, dark meat 2.0
Turkey, white meat 1.2
Source: MCkinley Health center, University of Illinois