R19

R19 may refer to:
 * HMS Zephyr (R19), a destroyer of the Royal Navy
 * R19: May form explosive peroxides, a risk phrase
 * R-19 regional road (Montenegro)
 * Renault 19, a French automobile
 * Samsung Sens R19, a laptop
 * USS R-19 (SS-96), a submarine of the United States Navy