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Top 10 Longest Mountain Ranges in the World

By Dhiraj Sharma · Published November 12, 2026

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The longest mountain ranges ranked here use the 2025 Factbook land-based approximate lengths, and mid-ocean ridges are labelled separately. Rank follows the 2025 World Factbook compilation of the ten longest land-based mountain ranges, whose lengths are given as approximate, and a mid-ocean ridge is labelled separately rather than treated as a silent first-place land range ^[1]. In that official list the Andes are first, at about 7,000 kilometres, running through Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina ^[1]. The Rocky Mountains are second, at about 4,830 kilometres, in Canada and the United States ^[1]. The Great Dividing Range is third, at about 3,700 kilometres, in Australia, and the Transantarctic Mountains are fourth, at about 3,500 kilometres ^[1]. The Kunlun Mountains, about 3,000 kilometres; the Ural Mountains, about 2,640 kilometres; the Atlas Mountains, about 2,500 kilometres; the Appalachian Mountains, about 2,400 kilometres; the Himalayas, about 2,300 kilometres; and the Altai Mountains, about 2,000 kilometres, complete the same official land-based ten ^[1]. If oceans are included, the Mid-Ocean Ridge is by far the longest mountain range, at 40,389 kilometres, a different official class that this article does not use to reorder the land-based table ^[1].

Other published lists give different approximate lengths, or include different named systems, and those differences are labelled rather than used as silent replacements. The Southern Great Escarpment is sometimes given as about 5,000 kilometres, an escarpment system that the 2025 Factbook land-based ten does not use as a second-place range ^[2]. The Great Dividing Range is often given as about 3,500 kilometres rather than 3,700, the Urals as about 2,500 rather than 2,640, the Appalachians as about 3,200 or 2,414 rather than 2,400, and the Himalayas as about 2,400 to 2,600 rather than 2,300 ^[2]. The North American Cordillera and the Alpine-Himalayan orogenic belt are larger systems or belts, not silent substitutes for the named ranges in the Factbook ten. This list ranks named ranges by length, not by the height of a single peak, and it is not a least-populated-countries list.

Key Facts

The ten below are the 2025 Factbook land-based leaders, with lengths approximate: the Andes 7,000 kilometres, the Rocky Mountains 4,830, the Great Dividing Range 3,700, the Transantarctic Mountains 3,500, the Kunlun Mountains 3,000, the Ural Mountains 2,640, the Atlas Mountains 2,500, the Appalachian Mountains 2,400, the Himalayas 2,300, and the Altai Mountains 2,000 ^[1]. Rank 1 is the outstanding official land-based approximate length, which is also the only range in the ten at 7,000 kilometres in that compilation.

The table is the official spine: one 2025 Factbook land-based list, mid-ocean ridges labelled separately, later or alternative approximate lengths labelled, and no unofficial belt or escarpment substitution is smuggled in as the Factbook fact.

Longest Mountain Ranges at a Glance

Rank	Range	Approximate length (km)	2026 note
1	Andes	7,000	2025 Factbook land-based length; some later lists give a longer figure, labelled separately
2	Rocky Mountains	4,830	Canada and the United States; not a range from Alaska to Mexico in this official list
3	Great Dividing Range	3,700	2025 Factbook length; many other lists give about 3,500, labelled separately
4	Transantarctic Mountains	3,500	Official land-based length in the same 2025 list
5	Kunlun Mountains	3,000	Official land-based length in the same 2025 list
6	Ural Mountains	2,640	2025 Factbook length; many other lists give about 2,500, labelled separately
7	Atlas Mountains	2,500	Official land-based length in the same 2025 list
8	Appalachian Mountains	2,400	2025 Factbook length; other lists give about 2,414 or 3,200, labelled separately
9	Himalayas	2,300	2025 Factbook length; other lists give about 2,400 to 2,600, labelled separately
10	Altai Mountains	2,000	Official land-based length in the same 2025 list

1. Andes

The Andes have an official 2025 Factbook land-based approximate length of 7,000 kilometres, the longest land-based mountain range in that compilation, running through Venezuela, Colombia, Ecuador, Peru, Bolivia, Chile, and Argentina ^[1]. Some later lists give a longer figure of about 9,000 kilometres, a different approximate measure that this article labels rather than uses as a silent replacement ^[2]. The figure is a range length, not the height of Aconcagua, and not a combined length with the Mid-Ocean Ridge. This article records the official 7,000-kilometre Factbook length.

It is first as the outstanding official land-based approximate length, a labelled 7,000-kilometre fact, and the documentary centre of this ten ^[1]. A later official Factbook revision will belong in a revision of the cell.