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There is no magic number, and that is good news

Most people starting a petition want a single target: 100, 1,000, 10,000. It feels reassuring to have a finish line. But a signature count is not the goal of a petition, it is a tool. The real goal is a decision, and decisions are made by people, not by numbers.

A petition to keep one local bus route running might win with 300 signatures, because 300 residents is a meaningful share of the people that route serves and the local councillor can see every one of them is a constituent. A national policy change might need tens of thousands before a minister feels any pressure at all. The same number means very different things in different contexts.

So instead of asking "how many signatures do I need?", ask "how many signatures would make my decision maker take this seriously?" That reframing is the whole of this guide.

Set your goal by your target, not by a round number

Work backwards from the person who can actually grant your demand. Three questions set your real target:

• How big is the group affected? A petition that gathers signatures from a large share of the people directly affected is powerful even if the total is small. 500 names out of a town of 2,000 is overwhelming; 500 out of a country of 50 million is invisible. Proportion often matters more than the raw count.
• Who is the decision maker, and what do they respond to? A school principal, a company, a city council and a national parliament all weigh public pressure differently. Choosing the right person is half the battle, which is why it deserves its own guide: read How to Choose the Right Decision Maker.
• Is there an official threshold? Some government petition systems have a legal number that triggers a response or a debate. If your petition feeds into one of those, that number is your target. The table below lists the main ones.

A good working goal is the smallest number that is clearly more than your decision maker can ignore, with a stretch goal above it. For a local issue that might be a few hundred. For a national campaign it might be tens of thousands.

Official petition thresholds by country

These numbers apply only to official government petition systems, where reaching a set figure legally obliges a parliament or government to respond, debate, or review the issue. They are useful benchmarks even if you are petitioning elsewhere, because they show what level of support institutions treat as significant.

Two things stand out. First, the numbers vary by a factor of two thousand, from 500 in Canada to a million in the EU, which proves there is no universal "enough". Second, most countries have no official threshold at all, so for the vast majority of campaigns the only target that matters is the one your decision maker will respond to.

Local, national and government petitions are not the same race

Local petitions aimed at a school, a business, a neighbourhood or a city council usually win in the hundreds, sometimes the low thousands. Here proportion and proximity beat volume: signatures from people who live on the street, use the service, or vote in that ward carry far more weight than strangers from the other side of the country.

National petitions aimed at a government department or a large company typically need to reach the thousands or tens of thousands before they generate the media attention and political discomfort that move a large institution. At this scale, signatures are partly a measure of how newsworthy your cause is.

Official government petitions live or die by the legal threshold in the table above. If you are aiming for a parliamentary response or debate, that number is non-negotiable, and your whole strategy should be built around clearing it before the deadline.

Use milestones, not one distant finish line

Whatever your final target, do not point your supporters at it from day one. A goal of 25,000 makes a petition with 40 signatures feel hopeless, and an empty-looking petition is one nobody wants to join.

Instead, break the journey into milestones that each feel within reach: 100, then 500, then 1,000, and so on. Every milestone is a small win you can celebrate publicly, and each celebration is a reason to post an update and bring in a fresh wave of signers. This is not a trick, it is how momentum actually builds. Research on social proof shows that people are far more willing to join something that is visibly growing than something that looks stalled.

Set the visible target just above your current count so the progress bar always looks close to full, and raise it each time you reach it. The science behind why this works is covered in What Scientific Research Says About Online Petitions.

What matters more than the number

It is tempting to treat the signature count as the scoreboard, but decision makers rarely respond to a number in isolation. They respond to a combination of signs that an issue has real, organised support behind it:

• Who signed: A few hundred constituents, customers or affected people outweigh thousands of unconnected names.
• Momentum: A petition gaining signatures fast tells a decision maker the pressure is still rising.
• Visibility: Media coverage, comments and shares turn a number into a story that is harder to dismiss.
• Delivery: How you present the petition matters as much as its size. A handed-over petition with a clear ask lands harder than a link in an inbox, as explained in How to Deliver a Petition.
• The follow-through: A petition is one tactic in a campaign, not the whole of it. The number opens the door; what you do next decides whether anything changes.