DumbLand is an adult-animated web series created and voiced by director David Lynch that was commissioned by gaming and entertainment website, Shockwave.com in 2000. After the dot-com bubble burst, the episodes were eventually released on the Internet in 2002 through Lynch's website, and were released as a DVD on March 28, 2006. The total running time of all eight episodes is 33 minutes, 28 seconds.

The series details the daily routines of a dull-witted white trash man. The man lives in a house along with his frazzled wife and squeaky-voiced child, both of whom are nameless as is the man in the shows. Lynch's website, however, identifies the male character by the name Randy and the child by the name Sparky. The wife is not named.

The style of the series is intentionally crude both in terms of presentation and content, with limited animation.

Each three-to-five-minute episode took Lynch ten days to make. The soundtrack was created at his home using a computer and he drew the animation with a mouse.

The final episode "Ants" parodies Lynch's attempts at being a music producer in the early 1990s by featuring a singer who resembles Julee Cruise and music similar to that of long-time collaborator Angelo Badalamenti (both of whom Lynch worked with on the soundtrack to Twin Peaks as well as the concert film Industrial Symphony No. 1).

The presentation of the series on the Criterion Channel called it "the angriest cartoon in the world".

The series was screened as part of a Lynch retrospective in Lisbon in 2007.