| Cohors IV Delmatarum | |
|---|---|
 Roman infantry helmet (late 1st century) | |
| Active | early 1st century to at least early 2nd century |
| Country | Roman Empire |
| Type | Roman auxiliary cohort |
| Role | infantry |
| Size | 480 men |
| Garrison/HQ | Britannia 103-126 |
Cohors quarta Delmatarum ("4th Cohort of Dalmatae") was a Roman auxiliary infantry regiment raised in the 1st century AD and continuing to serve into the 2nd century.