Kleinandelfingen is a municipality in the district of Andelfingen in the canton of Zürich in Switzerland.

Kleinandelfingen is first mentioned around 1270 as ex opposito Andolfingen ultra Thuram.

Between 1303-09 it was mentioned as Andolfingen ennunt der Ture, in 1427 as Minder Andellfingen, and in 1474 as von cleinen Andelffingen.

Of the rest of the land, 11.9% is settled (buildings or roads) and the remainder (3.4%) is non-productive (rivers, glaciers or mountains).

Most of the population (as of 2000[update]) speaks German (91.9%), with Italian being second most common ( 2.0%) and Serbo-Croatian being third ( 1.6%).