The Northern Range is the range of tall hills across north Trinidad, the major island in the Republic of Trinidad and Tobago. The hills range from the Chaguaramas peninsula on the west coast to Toco in the east. The Northern Range covers approximately twenty-five percent of the land area of Trinidad.

The Northern Range runs from the Chaguaramas Peninsula in the west to Toco in the east. The eastern Northern Range (areas east of Arima) remain most heavily forested. Portions west of Arima, especially the southern slopes and valleys, have been extensively deforested, since they lie immediately north of the most heavily populated parts of the island.

At the western end of the Northern Range, the capital city, Port of Spain, climbs into the hills and the valleys are settled and largely deforested.

The Arima Valley remains as the westernmost valley that is still primarily forested, in a large part due to the presence of the Asa Wright Nature Centre in this valley.

The hills rise abruptly from the lowlands of northern Trinidad (the so-called East–West Corridor), but only the two tallest peaks, El Cerro del Aripo and El Tucuche top 900 m. The south-facing valleys run deep into the hills and support major rivers, such as the Caroni River, while the north-facing valleys are generally short and are drained by smaller streams.

There are numerous streams and waterfalls in the Northern Range. The highest waterfall is Maracas waterfall, towering 91.5 metres (300 ft) high. Other waterfalls include the Rincon Falls, Rio Seco Falls and Marianne Falls.

The Northern Range consists mainly of sedimentary rocks, schists and limestones; portions at the eastern end of the range are of volcanic origin.

The country's largest cave system, the Aripo Cave, is located in the Northern Range. The caves feature stalagmite and stalactite formations. These caves are inhabited by nocturnal oilbirds, and bats.