
Western Australia is located in the western part of Australia and is geographically positioned in both the southern and eastern hemispheres. The state is bounded to the north and west by the Indian Ocean, to the south by the Southern Ocean, to the north by the Timor Sea, and to the southeast by South Australia. The latitude and longitude coordinates of Western Australia are -25.042261, 117.793221, or 25° 2' 32.1396'' S and 117° 47' 35.5956'' E. The Tropic of Capricorn passes through Western Australia, and the border along the eastern edge of Western Australia is determined by the 129th meridian east longitude.
| Characteristics | Values |
|---|---|
| Longitude | 117.793221 |
| Latitude | 25.042261 |
| GPS Coordinates | 25° 2' 32.1396'' S and 117° 47' 35.5956'' E |
| Border | The eastern edge of Western Australia is not one continuous straight line. The border is determined by the 129th meridian east longitude. |
| Capital City | Perth |
| Economy | Tourism, mineral processing, and agriculture |
| Climate | Arid |
| Tropic | Capricorn |
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What You'll Learn

Western Australia's coordinates are -25.042261, 117.793221
Western Australia is located at the coordinates -25.042261, 117.793221. This translates to 25° 2' 32.1396'' S and 117° 47' 35.5956'' E in DMS (degrees, minutes, and seconds) format.
Western Australia is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Timor Sea to the north, and South Australia to the southeast. It occupies approximately one-third of the Australian continent, with a total area of close to 1 million square miles. The state's economy relies heavily on tourism, mineral processing, and agriculture, and it is the world's second-largest producer of iron ore.
The capital city of Western Australia is Perth, situated on the west bank of the Swan River between the Darling Ranges and the Indian Ocean. Other major cities in the state include Albany, Kalgoorlie, and Mandurah. The latitude and longitude of these cities are as follows:
- Perth: 31° 57' S, 115° 51' E
- Albany: 34° 58' S, 117° 52' E
- Kalgoorlie: 30° 43' S, 121° 30' E
- Mandurah: 32° 32' S, 115° 44' E
Western Australia is positioned in both the southern and eastern hemispheres. Its southernmost border with the Northern Territory is defined by the 26th parallel south, which also crosses the Atlantic Ocean, Africa, the Indian Ocean, the Pacific Ocean, and South America.
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The Tropic of Capricorn passes through Western Australia
Western Australia is geographically positioned in both the southern and eastern hemispheres. It is located at a latitude of 25.042261 and a longitude of 117.793221. The Tropic of Capricorn, on the other hand, is a circle of latitude that is currently at 23.43596 degrees south of the equator. It is the southernmost latitude where the sun can be seen directly overhead.
The Tropic of Capricorn passes through Australia, Chile, Southern Brazil, and South Africa. In Australia, it sweeps through Queensland, showcasing a host of geological wonders and the results of drastic climate change over time. The Tropic of Capricorn also passes through Western Australia, where it is marked by a monument just north of Alice Springs in the Northern Territory.
The position of the Tropic of Capricorn is not fixed but is constantly changing due to a slight wobble in the Earth's longitudinal alignment relative to its orbit around the sun. This wobble causes the Tropic of Capricorn to drift northward at a rate of about 0.47 arcseconds, or 15 meters, per year.
Western Australia is the largest state in the country, occupying approximately one-third of the continent and having an area of close to 1 million square miles. It is bounded to the north and west by the Indian Ocean, to the south by the Southern Ocean, and to the southeast by South Australia. The state boasts a diverse economy, with tourism, mineral processing, and agriculture as its main fields.
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The 129th meridian east longitude is the border of Western Australia
The 129th meridian east longitude is the nominal border of Western Australia. The meridian extends from the North Pole, across the Arctic Ocean, Asia, Australia, the Indian Ocean, the Southern Ocean, and Antarctica to the South Pole. In Australia, the 129th meridian east longitude forms the eastern border of Western Australia and the western borders of the Northern Territory and South Australia.
The border of Western Australia has a rich history. The survey of the Western Australian border was first discussed in 1911, but an agreement was not reached until 1922. The agreement, signed by then-Prime Minister W.M. Hughes, the Acting Premier for South Australia, Mr. Bice, and the Premier of Western Australia, Sir James Mitchell, set the border as a line determined by the 129th meridian east longitude.
However, it is important to note that the actual border of Western Australia deviates from the 129th meridian east longitude and is not a single straight line. This deviation is due to various reasons, including the use of different technologies and methods for surveying and calculating lines of longitude. For example, the Northern Territory border with Western Australia lies approximately 127 meters west of the South Australian border with Western Australia.
The Western Australian town closest to the border is Kununurra, which is about 25 kilometers west of the border with the Northern Territory. The settlement outside of Western Australia that is closest to the border is Border Village, which adjoins the border and is located about 250 meters from it.
Determining the position of the border of Western Australia has been a complex process, influenced by historical factors and the development of technology for calculating longitude.
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The westernmost point of Australia is in Western Australia
Western Australia is the largest state in Australia, occupying approximately one-third of the continent and with an area close to 1 million square miles. It is bounded to the north and west by the Indian Ocean, to the south by the Southern Ocean, to the north by the Timor Sea, and to the south-east by South Australia. The Tropic of Capricorn passes through Western Australia, as well as Queensland and the Northern Territory. The westernmost point of Australia is located within this state, which is positioned in both the southern and eastern hemispheres.
The determination of Western Australia's border has been a complex process. The survey of the border was first discussed in 1911, but an agreement was not signed until 1922. This agreement set the border as a line determined by the 129th meridian east longitude, with the additional requirement that the boundary be defined by lines running north and south from independently fixed points at Deakin and Argyle. However, when survey work began on the South Australia-Northern Territory border in 1963, it was realised that these lines could not meet exactly. The western boundary of Western Australia is, therefore, not one continuous straight line.
The process of surveying the border was challenging due to the harsh conditions faced by surveyors and the lack of funding and equipment. Errors in the astronomically determined positions of observatories in Melbourne and Sydney also contributed to the difficulties. As a result, the border disputes arose between several states, with rulings generally upholding the position of borders with established physical references or property lines. Despite advancements in technology that allow for more accurate plotting of locations, few state borders are where they were originally intended or as simple as a straight line marked by a meridian of longitude.
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The westernmost city in Australia is Perth, WA
Western Australia is located in the western part of Australia and is bounded by the Indian Ocean to the north and west, the Southern Ocean to the south, the Timor Sea to the north, and South Australia to the southeast. The state covers approximately one-third of the Australian continent and has an area of close to 1 million square miles. The latitude and longitude coordinates of Western Australia are -25.042261, 117.793221, or 25° 2' 32.1396'' S and 117° 47' 35.5956'' E.
While Perth is the westernmost city in Australia, the westernmost point of mainland Australia is Steep Point, located within the Gascoyne region of Western Australia. It is approximately 670 kilometres (420 miles) north of Perth and is part of the Shark Bay World Heritage Site. Steep Point is known for its rugged terrain and is accessible only by four-wheel-drive vehicles.
The northwestern point of continental Australia is North West Cape, and the southwestern point is Cape Leeuwin, both located in Western Australia. The state is also home to other significant landmarks, such as the Zuytdorp Cliffs, which stretch for over 200 kilometres along the coast.
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Frequently asked questions
The 129th meridian east longitude.
The latitude and longitude coordinates of Western Australia are -25.042261, 117.793221.
Perth.
The Tropic of Capricorn and the 26th parallel south.








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