R22

R22 may refer to:

Roads

 * R22 road (Belgium)
 * R-22 regional road (Montenegro)
 * R22 highway (Russia)
 * R22 (South Africa)

Vessels

 * HMS Ursa (R22), a destroyer of the Royal Navy
 * INS Viraat (R22), an aircraft carrier of the Indian Navy
 * USS R-22 (SS-99), a submarine of the United States Navy
 * YUGOSLAV DESTROYER Pula

Other uses

 * R22 (New York City Subway car)
 * Chlorodifluoromethane, a refrigerant
 * Fiat R.22, an Italian reconnaissance aircraft
 * Ndonga dialect
 * R22: Harmful if swallowed, a risk phrase
 * R-22 Spearhead, a fictional starfighter in the Star Wars universe
 * Robinson R22, an American helicopter
 * R22 refrigerant