Number of counties by state in the 100 poorest counties: Texas, 17; Kentucky, 16; Mississippi, 14; South Dakota, 10; Louisiana, 5; Alabama, 4; Georgia, 4; Montana, 4; New Mexico, 4; North Dakota, 3; Arizona, 2; Idaho, 2; Nebraska, 2; Tennessee, 2; West Virginia, 2; Alaska, 1; Arkansas, 1; Colorado, 1; Florida, 1; Missouri, 1; Oklahoma, 1; South Carolina, 1; Utah, 1;...