Ni Hao, Kai-Lan is an American animated children's television series produced by Nickelodeon Animation Studio. It began as a series of three interstitial shorts on Nick Jr. called Downward Doghouse. The first full episode was initially set to premiere on October 22, 2007 on Nickelodeon's Nick Jr. block in the United States, but was delayed to February 7, 2008 to coincide with Chinese New Year.

Ni Hao, Kai-Lan is based on the childhood memories of the show's creator, Karen Chau, who grew up in a bicultural Chinese-American household. "Ni hao" (你好 nǐ hǎo) means "Hello" in Mandarin, and Kai-Lan (凯兰 Kǎilán) is the Chinese name Chau was given at birth, which was later anglicized to Karen.

The first two seasons had 20 episodes each. The third season consisted of a two-part series finale. Sascha Paladino was the head writer and developer for the show.

This series was released on Paramount+ (at the time CBS All Access) on January 19, 2021, until it was removed on December 22, 2024, due to licensing contracts.