Wikipedia is generally not censored by the ors but there may be censorship of some or all of Wikipedia content by individual governments.
The ors of Wikipedia decide by community consensus as to what content is added. The only censorship by the community of note is the decision to blacklist certain images and restrict the visibility of various articles. Depictions of Muhammad, which cause offence to some Muslims, have not been censored.
A number of methods can be used to prevent a computer from showing images contained in Wikipedia. If you wish to do this, see the options at Help:Options to hide an image.
Wikipedia supports https for all pages. Sometimes this can interfere with page blocking or reduce the risk of repercussions.
Some possible ways to circumvent censorship by outside forces according to page name:
Some possible ways to circumvent censorship targeting pages containing specific named images:
These methods do not protect users who may be subject to threats to their employment or freedom for viewing certain types of content. For them, a very careful exploration of HTTP tunnels, virtual private networks, The Onion Router protocol, or "sneakernet" may or may not be appropriate.