維基百科標誌係維基百科係象徵，係一個立體拼圖球體，每塊拼圖都有不同語言系統嘅字母，圖形底下的文字分別為「維基百科」同囗號「自由嘅百科全書」（The Free Encyclopedia）。
In one respect this book is an experiment, and may chance to prove a failure: I mean that I have not thought it necessary to maintain throughout the gravity of style which scientific writers usually affect, and which has somehow come to be regarded as an ‘inseparable accident’ of scientific teaching. I never could quite see the reasonableness of this immemorial law: subjects there are, no doubt, which are in their essence too serious to admit of any lightness of treatment – but I cannot recognise Geometry as one of them. Nevertheless it will, I trust, be found that I have permitted myself a glimpse of the comic side of things only at fitting seasons, when the tired reader might well crave a moment’s breathing-space, and not on any occasion where it could endanger the continuity of the line of argument.
2001年11月，又有維基友建議新嘅標誌。喺2001年11月至12月期間，維基百科舉行咗首個標誌選舉，並挑選咗24個候選勝出嘅標誌。勝出者為最尾嘅標誌（#24），由The Cunctator設計。 標誌入面有以下嘅引文（粗體示），來自《利維坦》第一部第六章：
Desire to know why, and how, curiosity; such as is in no living creature but man: so that man is distinguished, not only by his reason, but also by this singular passion from other animals; in whom the appetite of food, and other pleasures of sense, by predominance, take away the care of knowing causes; which is a lust of the mind, that by a perseverance of delight in the continual and indefatigable generation of knowledge, exceedeth the short vehemence of any carnal pleasure.
- 根據Nupedia網頁有關遞交圖像嘅存檔頁，Bjørn Smestad創作咗首個維基百科標誌 - 可見於該頁頁底"Logo ideas posted with permission of their designers. Click on a logo to go to its designer's website."該頁圖像連結指往此存檔頁："Assistant Professor Bjørn Smestad"