Checked
Illinois Bridge Conditions
Highway bridges longer than 20 feet in the 2025 National Bridge Inventory
Yearly inspection ratings. A poor rating does not mean a bridge is unsafe to use.
- Highway bridges
- 26,927
- Good condition
- 44.6%
- 12,012
- Poor condition
- 9.5%
- 2,563
- Weight-limited or closed
- 937
Bridges by county
| County | Bridges | Good | Poor | Weight-limited | Avg. year built |
|---|---|---|---|---|---|
| Adams County | 317 | 40.7% | 6% (19) | 9 | 1977 |
| Alexander County | 93 | 28% | 8.6% (8) | 3 | 1982 |
| Bond County | 162 | 45.7% | 11.1% (18) | 11 | 1972 |
| Boone County | 109 | 41.3% | 10.1% (11) | 3 | 1986 |
| Brown County | 71 | 47.9% | 14.1% (10) | 5 | 1975 |
| Bureau County | 374 | 37.7% | 16% (60) | 15 | 1979 |
| Calhoun County | 81 | 51.9% | 4.9% (4) | 3 | 1983 |
| Carroll County | 180 | 32.2% | 14.4% (26) | 3 | 1979 |
| Cass County | 76 | 31.6% | 17.1% (13) | 2 | 1987 |
| Champaign County | 728 | 59.3% | 8.1% (59) | 6 | 1983 |
| Christian County | 320 | 18.1% | 17.2% (55) | 48 | 1970 |
| Clark County | 231 | 61.9% | 3.9% (9) | 2 | 1979 |
| Clay County | 167 | 49.7% | 14.4% (24) | 11 | 1982 |
| Clinton County | 190 | 55.8% | 6.8% (13) | 7 | 1977 |
| Coles County | 302 | 40.4% | 7% (21) | 9 | 1982 |
| Cook County | 1,722 | 27.4% | 14.3% (246) | 28 | 1969 |
| Crawford County | 198 | 33.8% | 5.6% (11) | 6 | 1983 |
| Cumberland County | 169 | 53.8% | 7.1% (12) | 2 | 1980 |
| De Witt County | 192 | 55.7% | 5.7% (11) | 3 | 1980 |
| DeKalb County | 262 | 39.3% | 12.6% (33) | 3 | 1982 |
| Douglas County | 233 | 74.2% | 1.7% (4) | 3 | 1982 |
| DuPage County | 345 | 35.9% | 7.5% (26) | 7 | 1985 |
| Edgar County | 278 | 47.1% | 4% (11) | 8 | 1977 |
| Edwards County | 79 | 64.6% | 7.6% (6) | 2 | 1982 |
| Effingham County | 254 | 47.6% | 4.7% (12) | 8 | 1974 |
| Fayette County | 356 | 57% | 4.5% (16) | 15 | 1977 |
| Ford County | 302 | 45.4% | 7.9% (24) | 6 | 1983 |
| Franklin County | 310 | 76.8% | 2.9% (9) | 3 | 1983 |
| Fulton County | 209 | 21.5% | 21.1% (44) | 4 | 1977 |
| Gallatin County | 82 | 79.3% | 7.3% (6) | 2 | 1985 |
| Greene County | 162 | 50.6% | 6.8% (11) | 7 | 1981 |
| Grundy County | 268 | 36.2% | 28.4% (76) | 14 | 1984 |
| Hamilton County | 169 | 79.3% | 2.4% (4) | 2 | 1990 |
| Hancock County | 290 | 42.1% | 21.7% (63) | 30 | 1978 |
| Hardin County | 61 | 57.4% | 6.6% (4) | 0 | 1976 |
| Henderson County | 142 | 32.4% | 12.7% (18) | 6 | 1985 |
| Henry County | 329 | 46.8% | 12.8% (42) | 10 | 1979 |
| Iroquois County | 568 | 45.4% | 14.6% (83) | 27 | 1980 |
| Jackson County | 228 | 65.8% | 7% (16) | 2 | 1989 |
| Jasper County | 181 | 71.3% | 4.4% (8) | 8 | 1983 |
| Jefferson County | 259 | 44% | 8.1% (21) | 7 | 1984 |
| Jersey County | 113 | 56.6% | 5.3% (6) | 2 | 1981 |
| Jo Daviess County | 192 | 44.8% | 10.9% (21) | 10 | 1973 |
| Johnson County | 118 | 55.1% | 2.5% (3) | 3 | 1979 |
| Kane County | 339 | 45.1% | 7.1% (24) | 14 | 1986 |
| Kankakee County | 344 | 36.3% | 9.9% (34) | 6 | 1982 |
| Kendall County | 131 | 51.1% | 11.5% (15) | 1 | 1990 |
| Knox County | 304 | 49% | 10.5% (32) | 1 | 1982 |
| Lake County | 250 | 30.4% | 9.6% (24) | 14 | 1977 |
| LaSalle County | 528 | 37.5% | 14.2% (75) | 16 | 1978 |
| Lawrence County | 185 | 37.3% | 22.7% (42) | 5 | 1976 |
| Lee County | 373 | 39.4% | 11.3% (42) | 5 | 1980 |
| Livingston County | 579 | 51.5% | 7.9% (46) | 22 | 1978 |
| Logan County | 292 | 28.1% | 9.2% (27) | 6 | 1975 |
| Macon County | 346 | 24.6% | 15.6% (54) | 10 | 1984 |
| Macoupin County | 240 | 37.1% | 16.7% (40) | 20 | 1966 |
| Madison County | 524 | 47.1% | 8.8% (46) | 8 | 1980 |
| Marion County | 294 | 61.9% | 7.5% (22) | 10 | 1973 |
| Marshall County | 155 | 41.9% | 12.3% (19) | 3 | 1984 |
| Mason County | 86 | 36% | 3.5% (3) | 2 | 1981 |
| Massac County | 132 | 46.2% | 8.3% (11) | 12 | 1980 |
| McDonough County | 210 | 53.3% | 6.2% (13) | 8 | 1981 |
| McHenry County | 227 | 40.5% | 21.1% (48) | 17 | 1984 |
| McLean County | 625 | 60.6% | 2.6% (16) | 4 | 1982 |
| Menard County | 89 | 40.4% | 11.2% (10) | 7 | 1980 |
| Mercer County | 163 | 47.9% | 14.1% (23) | 8 | 1983 |
| Monroe County | 132 | 59.8% | 8.3% (11) | 1 | 1986 |
| Montgomery County | 261 | 51.7% | 3.8% (10) | 8 | 1978 |
| Morgan County | 234 | 48.3% | 7.3% (17) | 6 | 1984 |
| Moultrie County | 172 | 39.5% | 9.3% (16) | 3 | 1985 |
| Ogle County | 378 | 47.1% | 7.4% (28) | 4 | 1982 |
| Peoria County | 351 | 21.7% | 17.9% (63) | 15 | 1983 |
| Perry County | 136 | 37.5% | 7.4% (10) | 4 | 1981 |
| Piatt County | 246 | 55.7% | 5.7% (14) | 0 | 1979 |
| Pike County | 332 | 23.5% | 10.2% (34) | 17 | 1980 |
| Pope County | 87 | 66.7% | 4.6% (4) | 2 | 1984 |
| Pulaski County | 108 | 36.1% | 9.3% (10) | 3 | 1981 |
| Putnam County | 50 | 28% | 6% (3) | 3 | 1984 |
| Randolph County | 149 | 58.4% | 6.7% (10) | 2 | 1981 |
| Richland County | 151 | 70.2% | 4% (6) | 8 | 1980 |
| Rock Island County | 272 | 46% | 4.8% (13) | 4 | 1983 |
| Saline County | 185 | 70.8% | 4.3% (8) | 5 | 1986 |
| Sangamon County | 464 | 56.3% | 6% (28) | 10 | 1981 |
| Schuyler County | 115 | 22.6% | 10.4% (12) | 6 | 1982 |
| Scott County | 99 | 54.5% | 7.1% (7) | 2 | 1983 |
| Shelby County | 335 | 54.9% | 7.8% (26) | 25 | 1978 |
| St. Clair County | 485 | 48.5% | 9.3% (45) | 11 | 1978 |
| Stark County | 93 | 57% | 5.4% (5) | 1 | 1983 |
| Stephenson County | 340 | 59.7% | 3.2% (11) | 8 | 1977 |
| Tazewell County | 358 | 24.9% | 14.8% (53) | 15 | 1976 |
| Union County | 188 | 53.7% | 3.7% (7) | 6 | 1982 |
| Vermilion County | 494 | 29.1% | 6.3% (31) | 7 | 1980 |
| Wabash County | 90 | 58.9% | 5.6% (5) | 6 | 1983 |
| Warren County | 199 | 67.8% | 7.5% (15) | 3 | 1985 |
| Washington County | 234 | 49.6% | 6% (14) | 6 | 1974 |
| Wayne County | 265 | 55.1% | 7.9% (21) | 11 | 1983 |
| White County | 213 | 27.7% | 6.6% (14) | 2 | 1987 |
| Whiteside County | 278 | 19.4% | 8.3% (23) | 4 | 1977 |
| Will County | 656 | 43.3% | 9.9% (65) | 21 | 1983 |
| Williamson County | 200 | 66.5% | 3.5% (7) | 4 | 1985 |
| Winnebago County | 465 | 30.5% | 6.9% (32) | 26 | 1978 |
| Woodford County | 224 | 28.1% | 9.8% (22) | 5 | 1985 |
Frequently asked questions
- How many bridges in Illinois are in poor condition?
- In the 2025 National Bridge Inventory, 2,563 of 26,927 highway bridges in Illinois were rated poor (9.5% of rated bridges).
- Which Illinois counties have the most bridges in poor condition?
- Among counties with at least 30 bridges, the highest shares rated poor are Grundy County (28.4%), Lawrence County (22.7%), Hancock County (21.7%), Fulton County (21.1%), McHenry County (21.1%).
Source: Federal Highway Administration, National Bridge Inventory ยท 2025 data