Connecticut ranks #16 among US states for total patents filed in 2020, with 9,573 patents from 4,387 inventors across 220 cities. On a per-capita basis that is 2.6 patents per 1,000 residents, a standard benchmark for comparing state-level R&D intensity.
Top Cities in Connecticut 2020
| Rank | City | Patents | Inventors |
|---|---|---|---|
| #1 | Glastonbury, CT | 502 | 152 |
| #2 | Town of West Hartford, CT | 460 | 189 |
| #3 | Stamford, CT | 251 | 150 |
| #4 | Guilford, CT | 243 | 73 |
| #5 | New Haven, CT | 235 | 149 |
| #6 | Manchester, CT | 216 | 100 |
| #7 | South Windsor, CT | 195 | 71 |
| #8 | Middletown, CT | 179 | 87 |
| #9 | Vernon, CT | 177 | 73 |
| #10 | Tolland, CT | 159 | 52 |
| #11 | Danbury, CT | 158 | 94 |
| #12 | Westport, CT | 152 | 57 |
| #13 | Avon, CT | 150 | 73 |
| #14 | Ridgefield, CT | 150 | 78 |
| #15 | Norwalk, CT | 140 | 55 |
| #16 | Madison, CT | 137 | 59 |
| #17 | Windsor, CT | 132 | 54 |
| #18 | Wethersfield, CT | 132 | 42 |
| #19 | Farmington, CT | 130 | 58 |
| #20 | Southington, CT | 126 | 43 |
| #21 | Stratford, CT | 123 | 41 |
| #22 | Wallingford, CT | 122 | 63 |
| #23 | Hamden, CT | 122 | 68 |
| #24 | Rocky Hill, CT | 122 | 35 |
| #25 | Town of East Hartford, CT | 118 | 48 |