如我擁用香港車牌,我可否在加拿大駕車,而又不用領取國際車牌。

使用香港的駕駛執照便可，無須申請國際駕駛許可證 (International Driving Permit, IDP)，只有日本等非英語國家才需要國際駕駛許可證。
台灣是使用國際駕駛執照之名而非國際駕駛許可證的，英文就是 International Driving License，所以日本不接受。

http://www.cic.gc.ca/english/newcomers/after-transportation-driving.asp
Foreign licences
You may be able to use your foreign driver’s licence for a few months after you arrive in Canada, but eventually you will need to take a driving test here to remain licensed. This will include a road test and a knowledge test on the rules of the road.

http://www.driving-in.com/canada/
Documentation
Always carry important documentation while driving in Canada like your driver’s license, vehicle registration, certificate of motor insurance and passport. U.S. auto insurance is accepted as long as an individual is a tourist in Canada. U.S. insurance firms will issue a Canadian insurance card, which should be obtained and carried prior to driving into Canada.
If you do not own the car you are driving, you must carry a letter from the owner giving you permission to drive. Any foreign driver’s license is valid and therefore an International Driving permit is not required.

兩個答案都大致正確，但Bonnie(002)的方向較佳。因為要查詢有關法律條例應向目的地政府查詢，而非本地政府機構本詢，方為100%準確。

另外，國際駕駛許可證申請應為HK$80, 不是$50. 到運輸署用 TD51 表格即可

2011-05-19 09:21:11 補充：
表格:
http://www.td.gov.hk/filemanager/common/tdforms/td51(2011.03).pdf

Do remember that is call International driving PERMIT ( not licence)
therefore no such 國際車牌, only have 國際驾驶许可证.

regarding Canada-Ontario driving rules
"If you are a visitor to Ontario and want to drive while you are here, you must be at least 16 years old and have a valid driver's licence from your own province, state or country. If you are from another country and visiting Ontario for more than three months, you need an International Driver's Permit from your own country or you may have to apply for an Ontario driver's licence, depending on your length of stay. You should also ensure your automobile insurance coverage is sufficient, and that you carry the original or a true copy of the vehicle registration or Certificate of Title for your vehicle."
That 's mean less than 3 months = no need a permit
More than 3 months= need a permit

I don't know wich part of canada are you looking for, if Ontario is not the place that you corncer about please let me know.

申請國際車牌可以到運輸署辦理，無需考核，舊價五十大元，你有國際車牌就可以係加拿大合法駕駛，係人地地頭當然要自我保障。