There are no countries that directly border Australia, seeing as it is a continent. However, off the southeast coast you can find New Zealand, and that is it.
In other words, one.
No. Countries grouped with southeast Asia include Indonesia, Cambodia, Vietnam, Philippines, Malaysia, Singapore and Thailand. Australia is not grouped with Southeast Asia.
Antarctica is the continent south of Australia. There are no countries south of Australia, but New Zealand is southeast of Australia. However, since parts of Antarctica are claimed by certain countries, it is up to oneself to infer whether there are countries south of Australia.
Southeast Asia is a subregion of Asia, consisting of the countries that are geographically south of China, east of India, west of New Guinea and north of Australia.
Southeast Asia's borders follow those of the Southeast Asian countries. Burma, Thailand, Laos, and Vietnam form the northwest boundaries of Southeast Asia. Southeast Asia includes Indonesia, but does not include Papua New Guinea or Australia.
Australia is a single country. There are no other countries located in Australia. 2000 km to the southeast is the country of New Zealand, made up of two large islands and many smaller islands.
The Philippines has trade relations with countries in Southeast Asia, Japan, China, Afghanistan, Australia, New Zealand, the US and Canada, and some European countries.
Australia is the continent southeast of Asia.
Countries grouped with southeast Asia include Indonesia, Cambodia, Vietnam, Philippines, Malaysia, Singapore and Thailand. Note that Australia is not grouped with Southeast Asia.
Australia
South Australia is a state within the country of Australia. It does not contain any countries.
Gum trees, or eucalyptus trees, are native to Australia and parts of Southeast Asia. They are found throughout Australia, including many of the desert areas. They have also been introduced to North America and a variety of other countries.
New Zealand is the island nation southeast of Australia.