Charles Adler Jr. | |
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| Born | June 20, 1899 |
| Died | October 23, 1980 (aged 81) |
| Alma mater | Johns Hopkins University |
| Occupation(s) | Inventor, Engineer |
| Known for | Transportation Safety |
Charles Adler Jr. (June 20, 1899 – October 23, 1980) was an American inventor and engineer. He is most known for developing devices meant to improve transportation safety, including sonically actuated traffic lights, colorblind road signals, pedestrian push-buttons, and flashing aircraft lights.