The meridian 112° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole. The 112th meridian west forms a great circle with the 68th meridian east.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 112th meridian west passes through: ! scope="col" width="130" | Co-ordinates ! scope="col" | Country, territory or sea ! scope="col" | Notes ! scope="row" style="background:#b0e0e6;" | Arctic Ocean ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Wilkins Strait ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Unnamed waterbody ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Liddon Gulf ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Parry Channel ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Coronation Gulf ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Coronation Gulf ! scope="row" | 🇨🇦 ! scope="row" | 🇺🇸 ! scope="row" | 🇲🇽 ! scope="row" style="background:#b0e0e6;" | Gulf of California ! scope="row" | 🇲🇽 ! scope="row" style="background:#b0e0e6;" | Magdalena Bay ! scope="row" | 🇲🇽 ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica