The 10 longest Wikipedia articles

|The Volokh Conspiracy |

Jared Padalecki as Sam in "Supernatural." (Diyah Pera/The CW)

Prof. Mark Liberman (Language Log) has the data. Some tidbits, though you should read the whole post—first, the top 10 posts in length:

1 California Proposition 218 (1996)
2 List of Warriors characters
3 List of Dutch inventions and discoveries
4 South African labour law
5 Secret Wars (2015 comic book)
6 Constitution of Myanmar
7 Characters of Supernatural
8 The Dresden Files characters
9 List of Redwall characters
10 Characters of the Mass Effect universe

Number 24 on the list is History of Oregon State Beavers football, followed by Number 25, History of Western civilization.