O14 (disambiguation)

O14 is a set of model railway standards.

O14 may also refer to:


 * O-14 (Dubai), a skyscraper in the United Arab Emirates
 * Douglas O-14, an aircraft
 * HNLMS O 14, a submarine of the Royal Netherlands Navy
 * Oxygen-14, an isotope of oxygen
 * USS O-14 (SS-75), a submarine of the United States Navy