| County | 1999 | Rank | 1989(adj) | Rank | Change | Rank in Change | % Change | Rank in % Change |
| Indiana | $41,567 | NA | $37,375 | NA | 4,192 | NA | 11.2 | NA |
| Adams County | $40,625 | 43 | $37,368 | 28 | 3,257 | 75 | 8.7 | 75 |
| Allen County | $42,671 | 30 | $41,317 | 9 | 1,354 | 91 | 3.3 | 92 |
| Bartholomew County | $44,184 | 15 | $40,196 | 19 | 3,988 | 61 | 9.9 | 70 |
| Benton County | $39,813 | 49 | $34,861 | 46 | 4,952 | 41 | 14.2 | 46 |
| Blackford County | $34,760 | 80 | $33,125 | 62 | 1,635 | 90 | 4.9 | 90 |
| Boone County | $49,632 | 6 | $44,973 | 6 | 4,659 | 50 | 10.4 | 63 |
| Brown County | $43,708 | 21 | $38,190 | 25 | 5,518 | 36 | 14.4 | 45 |
| Carroll County | $42,677 | 29 | $36,997 | 32 | 5,680 | 33 | 15.4 | 40 |
| Cass County | $39,193 | 52 | $33,696 | 55 | 5,497 | 37 | 16.3 | 32 |
| Clark County | $40,111 | 48 | $35,543 | 43 | 4,568 | 52 | 12.9 | 50 |
| Clay County | $36,865 | 66 | $30,461 | 79 | 6,404 | 19 | 21.0 | 10 |
| Clinton County | $40,759 | 41 | $33,936 | 52 | 6,823 | 17 | 20.1 | 16 |
| Crawford County | $32,646 | 90 | $26,434 | 92 | 6,212 | 21 | 23.5 | 3 |
| Daviess County | $34,064 | 85 | $29,593 | 86 | 4,471 | 54 | 15.1 | 41 |
| Dearborn County | $48,899 | 7 | $40,750 | 13 | 8,149 | 3 | 20.0 | 17 |
| Decatur County | $40,401 | 47 | $35,952 | 40 | 4,449 | 55 | 12.4 | 53 |
| DeKalb County | $44,909 | 12 | $40,195 | 20 | 4,714 | 48 | 11.7 | 58 |
| Delaware County | $34,659 | 82 | $31,715 | 73 | 2,944 | 78 | 9.3 | 71 |
| Dubois County | $44,169 | 16 | $40,528 | 15 | 3,641 | 68 | 9.0 | 73 |
| Elkhart County | $44,478 | 13 | $40,199 | 18 | 4,279 | 59 | 10.6 | 62 |
| Fayette County | $38,840 | 56 | $33,180 | 61 | 5,660 | 34 | 17.1 | 27 |
| Floyd County | $44,022 | 18 | $36,937 | 34 | 7,085 | 14 | 19.2 | 22 |
| Fountain County | $38,119 | 62 | $32,151 | 68 | 5,968 | 28 | 18.6 | 23 |
| Franklin County | $43,530 | 23 | $35,995 | 38 | 7,535 | 8 | 20.9 | 12 |
| Fulton County | $38,290 | 58 | $33,927 | 53 | 4,363 | 57 | 12.9 | 50 |
| Gibson County | $37,515 | 63 | $33,725 | 54 | 3,790 | 66 | 11.2 | 59 |
| Grant County | $36,162 | 74 | $34,066 | 50 | 2,096 | 89 | 6.2 | 88 |
| Greene County | $33,998 | 86 | $30,031 | 82 | 3,967 | 62 | 13.2 | 49 |
| Hamilton County | $71,026 | 1 | $59,375 | 1 | 11,651 | 1 | 19.6 | 21 |
| Hancock County | $56,416 | 2 | $48,453 | 3 | 7,963 | 6 | 16.4 | 31 |
| Harrison County | $43,423 | 25 | $35,351 | 45 | 8,072 | 4 | 22.8 | 8 |
| Hendricks County | $55,208 | 3 | $51,774 | 2 | 3,434 | 69 | 6.6 | 86 |
| Henry County | $38,150 | 61 | $33,313 | 60 | 4,837 | 46 | 14.5 | 43 |
| Howard County | $43,487 | 24 | $40,897 | 12 | 2,590 | 84 | 6.3 | 87 |
| Huntington County | $41,620 | 35 | $38,522 | 24 | 3,098 | 77 | 8.0 | 79 |
| Jackson County | $39,401 | 51 | $33,442 | 57 | 5,959 | 29 | 17.8 | 26 |
| Jasper County | $43,369 | 26 | $37,049 | 31 | 6,320 | 20 | 17.1 | 27 |
| Jay County | $35,700 | 76 | $30,766 | 76 | 4,934 | 42 | 16.0 | 34 |
| Jefferson County | $38,189 | 59 | $32,213 | 65 | 5,976 | 27 | 18.6 | 23 |
| Jennings County | $39,402 | 50 | $31,949 | 70 | 7,453 | 10 | 23.3 | 5 |
| Johnson County | $52,693 | 5 | $45,471 | 5 | 7,222 | 13 | 15.9 | 36 |
| Knox County | $31,362 | 92 | $27,969 | 90 | 3,393 | 70 | 12.1 | 56 |
| Kosciusko County | $43,939 | 19 | $41,098 | 10 | 2,841 | 81 | 6.9 | 84 |
| LaGrange County | $42,848 | 27 | $35,426 | 44 | 7,422 | 11 | 21.0 | 10 |
| Lake County | $41,829 | 33 | $39,506 | 21 | 2,323 | 88 | 5.9 | 89 |
| LaPorte County | $41,430 | 36 | $36,949 | 33 | 4,481 | 53 | 12.1 | 56 |
| Lawrence County | $36,280 | 72 | $33,438 | 58 | 2,842 | 80 | 8.5 | 76 |
| Madison County | $38,925 | 54 | $35,607 | 42 | 3,318 | 73 | 9.3 | 71 |
| Marion County | $40,421 | 44 | $37,835 | 27 | 2,586 | 85 | 6.8 | 85 |
| Marshall County | $42,581 | 31 | $36,744 | 35 | 5,837 | 31 | 15.9 | 36 |
| Martin County | $36,411 | 71 | $30,297 | 81 | 6,114 | 25 | 20.2 | 14 |
| Miami County | $39,184 | 53 | $31,721 | 72 | 7,463 | 9 | 23.5 | 3 |
| Monroe County | $33,311 | 87 | $32,162 | 66 | 1,149 | 92 | 3.6 | 91 |
| Montgomery County | $41,297 | 39 | $36,366 | 37 | 4,931 | 43 | 13.6 | 48 |
| Morgan County | $47,739 | 10 | $42,521 | 8 | 5,218 | 38 | 12.3 | 54 |
| Newton County | $40,944 | 40 | $37,150 | 30 | 3,794 | 65 | 10.2 | 66 |
| Noble County | $42,700 | 28 | $38,735 | 23 | 3,965 | 63 | 10.2 | 66 |
| Ohio County | $41,348 | 38 | $34,052 | 51 | 7,296 | 12 | 21.4 | 9 |
| Orange County | $31,564 | 91 | $27,275 | 91 | 4,289 | 58 | 15.7 | 38 |
| Owen County | $36,529 | 70 | $30,375 | 80 | 6,154 | 24 | 20.3 | 13 |
| Parke County | $35,724 | 75 | $31,816 | 71 | 3,908 | 64 | 12.3 | 54 |
| Perry County | $36,246 | 73 | $31,354 | 74 | 4,892 | 45 | 15.6 | 39 |
| Pike County | $34,759 | 81 | $29,975 | 83 | 4,784 | 47 | 16.0 | 34 |
| Porter County | $53,100 | 4 | $48,205 | 4 | 4,895 | 44 | 10.2 | 66 |
| Posey County | $44,209 | 14 | $40,922 | 11 | 3,287 | 74 | 8.0 | 79 |
| Pulaski County | $35,422 | 77 | $32,989 | 63 | 2,433 | 86 | 7.4 | 82 |
| Putnam County | $38,882 | 55 | $35,961 | 39 | 2,921 | 79 | 8.1 | 78 |
| Randolph County | $34,544 | 84 | $32,152 | 67 | 2,392 | 87 | 7.4 | 82 |
| Ripley County | $41,426 | 37 | $34,533 | 49 | 6,893 | 16 | 20.0 | 17 |
| Rush County | $38,152 | 60 | $32,591 | 64 | 5,561 | 35 | 17.1 | 27 |
| St. Joseph County | $40,420 | 45 | $36,645 | 36 | 3,775 | 67 | 10.3 | 65 |
| Scott County | $34,656 | 83 | $28,193 | 89 | 6,463 | 18 | 22.9 | 7 |
| Shelby County | $43,649 | 22 | $39,411 | 22 | 4,238 | 60 | 10.8 | 60 |
| Spencer County | $42,451 | 32 | $37,349 | 29 | 5,102 | 40 | 13.7 | 47 |
| Starke County | $37,243 | 64 | $29,570 | 87 | 7,673 | 7 | 25.9 | 1 |
| Steuben County | $44,089 | 17 | $37,901 | 26 | 6,188 | 22 | 16.3 | 32 |
| Sullivan County | $32,976 | 89 | $29,773 | 84 | 3,203 | 76 | 10.8 | 60 |
| Switzerland County | $37,092 | 65 | $30,981 | 75 | 6,111 | 26 | 19.7 | 20 |
| Tippecanoe County | $38,652 | 57 | $35,860 | 41 | 2,792 | 82 | 7.8 | 81 |
| Tipton County | $48,546 | 9 | $40,491 | 16 | 8,055 | 5 | 19.9 | 19 |
| Union County | $36,672 | 68 | $31,973 | 69 | 4,699 | 49 | 14.7 | 42 |
| Vanderburgh County | $36,823 | 67 | $33,482 | 56 | 3,341 | 72 | 10.0 | 69 |
| Vermillion County | $34,837 | 79 | $28,993 | 88 | 5,844 | 30 | 20.2 | 14 |
| Vigo County | $33,184 | 88 | $30,506 | 77 | 2,678 | 83 | 8.8 | 74 |
| Wabash County | $40,413 | 46 | $34,684 | 47 | 5,729 | 32 | 16.5 | 30 |
| Warren County | $41,825 | 34 | $33,329 | 59 | 8,496 | 2 | 25.5 | 2 |
| Warrick County | $48,814 | 8 | $44,217 | 7 | 4,597 | 51 | 10.4 | 63 |
| Washington County | $36,630 | 69 | $29,717 | 85 | 6,913 | 15 | 23.3 | 5 |
| Wayne County | $34,885 | 78 | $30,467 | 78 | 4,418 | 56 | 14.5 | 43 |
| Wells County | $43,934 | 20 | $40,572 | 14 | 3,362 | 71 | 8.3 | 77 |
| White County | $40,707 | 42 | $34,536 | 48 | 6,171 | 23 | 17.9 | 25 |
| Whitley County | $45,503 | 11 | $40,400 | 17 | 5,103 | 39 | 12.6 | 52 |