The meridian 74° west of Greenwich is a line of longitude that extends from the North Pole across the Arctic Ocean, North America, the Atlantic Ocean, the Caribbean Sea, South America, the Pacific Ocean, the Southern Ocean, and Antarctica to the South Pole. It is the most populous meridian in the Americas and the second most populous west of Greenwich, being home to between 30.3 million and 31.2 million people as of 2019. In Antarctica, the meridian defines the western limit of the Argentinian territorial claim, and passes through the Chilean and British claims – the three claims overlap. The 74th meridian west forms a great circle with the 106th meridian east.

From Pole to Pole

Starting at the North Pole and heading south to the South Pole, the 74th meridian west passes through: ! scope="col" width="120" | Co-ordinates ! scope="col" width="125" | Country, territory or sea ! scope="col" | Notes ! scope="row" style="background:#b0e0e6;" | Arctic Ocean ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Nares Strait ! scope="row" style="background:#b0e0e6;" | Baffin Bay ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Foxe Basin ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Foxe Basin ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Foxe Basin ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Hudson Strait ! scope="row" | 🇨🇦 ! scope="row" style="background:#b0e0e6;" | Hudson Strait ! scope="row" | 🇨🇦 ! scope="row" | 🇺🇸 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" | 🇺🇸 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" | 🇧🇸 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" | 🇧🇸 ! scope="row" style="background:#b0e0e6;" | Atlantic Ocean ! scope="row" style="background:#b0e0e6;" | Caribbean Sea ! scope="row" | 🇭🇹 ! scope="row" style="background:#b0e0e6;" | Caribbean Sea ! scope="row" | 🇨🇴 ! scope="row" | 🇵🇪 ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" | ! scope="row" style="background:#b0e0e6;" | Gulf of Corcovado ! scope="row" | ! scope="row" style="background:#b0e0e6;" | Straits of Magellan ! scope="row" | ! scope="row" style="background:#b0e0e6;" | Pacific Ocean ! scope="row" style="background:#b0e0e6;" | Southern Ocean ! scope="row" | Antarctica