Where I live (Yorkshire), there were many signs in windows before the referendum, but they were so one-sided that you could have been forgiven for thinking that they were in response to someone saying: “Put a sign in your window if you are intelligent!”.
For general elections, I see quite a few signs mentioning “Vote for” for 3-4 different parties, but mostly when driving through villages.
We enjoyed all the responses to this, thanks!
And I have to remember that when I’m in the U.K., I’m mostly in city centres and near tourist attractions, so I’m not seeing as much of the residential areas.
I’ve heard repeated rumours that there are lawn signs in some areas of Canada. 
It’s a Canadian thing.
Federal and provincial elections in Canada aren’t necessarily on set dates; the ruling party can call one at any time. When this happens, the speed with which lawn signs are erected is kind of amazing. One day they’re not there, and the next they’re everywhere.
You get political lawn signs all the time too, for local issues.
I still have a Ken Dryden sign in my basement somewhere. I’ve heard that he used to be some kind of sports player in a previous career.
I’ve just started playing the game GeoGuessr where you try to figure where you are based on nothing but Google Street views. You’re deposited at a random place on the planet and try to guess where you are by interpreting signs, cars, topography, housing, etc. It’s interesting to see how many times I see areas flooded with political advertising. Thankfully, knowing world politics, they often help me with identifying where I am.
I quickly googled “canadian campaign signs” and I noticed almost all the signs were local candidates, not the national party leaders. Do Trudeau, Scheer, and the others get their own signs? And if they don’t, why?
Its a parliamentary system. His party wins then elects him.
They only run in their own constituency, it would be like seeing a Nancy Pelosi sign in Alaska or Alabama. The parties in Canada elect their leader and s/he becomes prime minister once that party controls the House of Commons.
Lawn signs are pretty small and are more to get the local candidate’s name out there.
The party leader tends to get his name on billboards and tv ads.
We’re in the run-up to a provincial election, and there’s lots of billboards with the current Premier, plus some showing him with the local candidate in a riding.
The ones of the Premier alone are all over the province in the bigger centres, along highways, and so on. The ones with the Premier and a candidate are usually just in that candidate’s riding.
Eh? They’re already leaders of their parties, usually elected long before the general election.
So, what is your point? If Trudeau’s party , the Liberal Party, doesnt win, is Trudeau PM? Nope. Well, maybe if the election is so close neither party wins.
And the party can choose another. They dont have to have a popular vote to do that.
In theory, of course, the Canadian PM is appointed by the governor general on behalf of the monarch.
In Panama there are signs, banners, flags, and bunting in party colors literally everywhere for months before the election, which is held every five years. It looks like the circus has come to town.
I’ve heard that rumour too! 
His point is that your statement in #29 that “his party wins then elects him” is wrong. The last statement in the above quote is wrong, too. The PM is not “appointed” by anyone; he is elected as permanent party leader (until he resigns, voluntarily or otherwise) by party delegates at a leadership convention that is held only when a new leader has to be selected. After an election, some party leader – generally the leader of the party that has won either a majority or plurality of parliamentary seats – meets with the monarch (or the monarch’s representative, the governor general) and asks to form a government. It’s not theory, it’s reality. In theory you could have a situation in which several parties form a coalition and nominate one of their leaders to ask to form a government instead, leading to a potential situation in which the party with a plurality of votes doesn’t form a government, but a lesser party does – and the governor general has the right to refuse such a request (or any other). Almost always, the party with the majority or plurality of seats is the one that forms the government in Canada, although coalitions are common in some other countries.
Back to the original question, signs for Trudeau or Scheer or whatever party leader exist only in their own ridings, where they run for MP (a seat in Parliament) like everybody else. Everywhere else, people vote for candidates for their local MP, and those are the names on the signs, along with the party logo.
In contrast to the strict delineation between the executive and legislative branches of government in the US, in Westminster parliamentary systems like in Canada and the UK, the head of the government executive branch and his/her cabinet members are also all MPs (members of parliament). This has both strengths and weaknesses, but it precludes the rancourous situations that arise when the executive and legislative branches are of different parties. The entire US system of government is intended by design to make governance a hard lift, with distrust of government inherently baked in to the system. The closest the parliamentary system comes to that situation is a minority government, where the governing party has a plurality but not a majority, and its legislative proposals can be outvoted by a combined opposition.
I don’t recall seeing them in yards when I was in Japan, but they were in place places. The candidates also drove around in vans with megaphones and blasted their campaign messages at high decibel levels, sometimes rather early in the morning.
There is some country , I think Israel, where you cannot run TV ads in the week before the election. If I am wrong about Israel someone will correct me .
US HOAs sometimes have rules about political signs but I don’t know if those would stand up if challenged in court.
The prime minister, along with the other ministers in cabinet, is appointed by the governor general on behalf of the monarch.[12] However, by the conventions of responsible government, designed to maintain administrative stability, the governor general will call to form a government the individual most likely to receive the support, or confidence, of a majority of the directly elected members of the House of Commons;[13] as a practical matter, this is often the leader of a party whose members form a majority, or a very large plurality, of Members of Parliament (MPs).[14]
I’m not going to get into an argument with you about how the Canadian system of government works. It works just as I described, and as further described here:
… Canada’s parliamentary system derives from the British, or “Westminster”, tradition. The Canadian system of parliamentary government has the following essential features:
…
[ul]
[li]The leader of the party having the support of the majority of the Members of the House of Commons is asked by the Governor General to form a government and becomes the Prime Minister;[/li][/ul]
The use of the word “appointed” comes from a very old document called the “Letters Patent Constituting the Office of Governor General of Canada” issued by King George VI in 1947 and predates both the modern Constitution (1982) and unwritten constitutional conventions (click or scroll down to “Constitutional Conventions”). It gives the GG the theoretical power to appoint Ministers, judges, ambassadors, and just about everybody else, though it says nothing about the Prime Minister himself, and even so, the GG actually appoints none of those; by constitutional convention, the Prime Minister does, and the PM himself acquires the position by virtue of being the leader of the winning party. The use of the word “appointed” is misleading at best as it implies that the governor general could appoint, say, his favorite son-in-law to be the next prime minister. That’s not how it works.
Like the Queen herself, the position of GG is largely symbolic and his or her discretionary powers are extremely limited. They have the power to invite a given party to form a government, to open and prorogue or dissolve parliament, to call an election, and to give royal assent to all legislation before it becomes law. But except in very rare and exceptional cases, these actions are all automatic and pretty much mandated. The political bickering over proroguing parliament during the 2008-2009 parliamentary session was one of the rare cases when the governor general actually exercised discretionary power. The idea of the GG (and the Queen in the UK) is to have a head of state and symbolic authority figure who rises above politics and is strictly non-partisan in the rare cases when they exercise discretionary power.
I was in Peru last fall and saw these shovel signs for the Popular Action party painted on many buildings in the countryside of Cusco state. I asked our guide about them and was informed they were political signs from the last election in 2016 (and earlier).