There is no residency requirement. The leader of a political party which obtains the most seats in an election becomes Prime Minister, so that person could have been in Canada for a day and became Prime Minister.
There is no upper or lower age limit, but in practice, if someone didn't have enough experience, nobody would vote for them.
Any Member of Parliament can become Prime Minister, therefore the lower age restriction is currently 18.
These days, you cannot run for Parliamentary election until you are 21 years old, but after that, there's no minimum age.
The youngest Prime Minister the UK has ever had is William Pitt the Younger, who took office in 1783 at the age of just 24 and was in office until 1801, although he returned to office for a second time from 1804-06, when he died aged only 47.
The second youngest is the current Prime Minister David Cameron, who was 44 when he took office.
Any person who is a Canadian citizen and at least 18 years old can be elected to Parliament, and therefore could theoretically become Prime Minister.
John A. Macdonald (born 1815 January 11) was 52 when he became the first Prime Minister of Canada on 1867 July 1.
There are no prime ministers in the USA, there are pm in Canada, UK ,Australia, and verious other european countries.
French Prime Minister was born in 1942 and he is 68 years old.
When David Cameron became Prime Minister in May 2010, he was 43 years old. He is the youngest Prime Minister since Robert Jenkinson in 1812 who was 42 years old at the time.
Winston Churchill was 66 years old when King George appointed him to be the prime minister after Neville Chamberlain died. He became the Prime Minister again in 1950. Even though he was fairly old to be the prime minister he was a formidable man. He lived to be almost 90 years old.
79
Robert Walpole was 44 years when he became prime minister.
44 years old
Harold Holt was born on 5 August 1908, and became Prime Minister in January 1966. He was 57 when he became Prime Minister.
The United States does not have a Prime Minister, they have a President. The current President of the United States is Barack Obama and he is 49 years old.
He was 45 years old.
Charles Michel, named prime minister in 2014, is 42 years old (born December 21, 1975). Elio De Rupo (prime minister 2011 to 2014) was born July 18, 1951.
The prime minister has changed since you asked this question. The current prime minister, Yoshihiko Noda, who took office on September 2, 2011, is 54 years old, having been born on May 20, 1957.
As of the 30th of June 2017, Joseph Muscat is the Prime Minister of Malta. He was born on the 22nd of January, 1974, so he is 43 years old.