Wikipedia was once an impossible dream
Today, it is 25 years of humanity at its best.
Founded on 15 January 2001, this coming year marks Wikipedia’s 25th birthday. With over 65 million articles across 300+ languages, Wikipedia informs everything from day-to-day life and AI chatbots to journalism and trivia wins.
Join us in celebrating what has become the backbone of knowledge on the internet.
Meet some of the humans making it possible
Wikipedia is written, edited, and fact checked by nearly 260,000 people, all volunteers from around the world. It is this meaningful work that continues to ensure that Wikipedia is reliable, well sourced, and from a neutral point of view.
The more humans take part, the better the internet’s knowledge becomes. Get to know the people who are keeping the dream alive.
Help support human knowledge
If you often find yourself relying on Wikipedia, now is the time to donate. Your help keeps knowledge on the internet free and open for everyone. Wikipedia has no ads and no subscriptions, which means that your support is essential for making every article as accessible as humanly possible.
The majority of our funding is from individual contributions that usually range from $2.75 USD to $25 USD.
Thank you for preserving human knowledge and collaboration online. Here is to the next 25 years and beyond.
25 years of collaboration consensus knowledge at its best
Our birthday is officially on 15 January. Sign up for Wikimedia Foundation updates and join the festivities.
For more details, see our Privacy statement.
We are starting the party early!
Wear your support on your sleeve, cap, or socks with our limited edition merch. Get ready for 15 January, when we drop a special birthday collection.
The world’s knowledge needs you
Learn about the impact you can make by donating to Wikipedia and what your contribution will support.
7 reasons you should donate to Wikipedia
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Love Wikipedia? Get to know the nonprofit behind it
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