Illinois ranks #7 among US states for total patents filed in 2019, with 17,803 patents from 9,120 inventors across 552 cities. On a per-capita basis that is 1.4 patents per 1,000 residents, a standard benchmark for comparing state-level R&D intensity.
Top Cities in Illinois 2019
| Rank | City | Patents | Inventors |
|---|---|---|---|
| #1 | Chicago, IL | 3,499 | 1,801 |
| #2 | Bloomington, IL | 704 | 190 |
| #3 | Naperville, IL | 600 | 332 |
| #4 | Champaign, IL | 453 | 176 |
| #5 | Evanston, IL | 443 | 259 |
| #6 | Arlington Heights, IL | 303 | 150 |
| #7 | Libertyville, IL | 259 | 128 |
| #8 | Normal, IL | 259 | 62 |
| #9 | Palatine, IL | 253 | 113 |
| #10 | Peoria, IL | 246 | 176 |
| #11 | Urbana, IL | 238 | 135 |
| #12 | Schaumburg, IL | 220 | 107 |
| #13 | Lake Forest, IL | 210 | 52 |
| #14 | Rockford, IL | 194 | 93 |
| #15 | Glenview, IL | 178 | 87 |
| #16 | Northbrook, IL | 176 | 84 |
| #17 | Hoffman Estates, IL | 173 | 78 |
| #18 | Crystal Lake, IL | 171 | 78 |
| #19 | Aurora, IL | 171 | 98 |
| #20 | Buffalo Grove, IL | 170 | 102 |
| #21 | Vernon Hills, IL | 169 | 100 |
| #22 | Dunlap, IL | 158 | 82 |
| #23 | Barrington, IL | 155 | 71 |
| #24 | Des Plaines, IL | 155 | 71 |
| #25 | Gurnee, IL | 146 | 80 |