Montherod is a former municipality in the Swiss canton of Vaud. It is located in the district of Morges. On 1 January 2021 the former municipality of Montherod merged into the municipality of Aubonne.

Montherod was first mentioned in about 1344 as Monterot.

Montherod had an area, as of 2009^[update], of 4.97 square kilometers (1.92 sq mi). Of this area, 2.31 km² (0.89 sq mi) or 46.5% is used for agricultural purposes, while 2.26 km² (0.87 sq mi) or 45.5% is forested. Of the rest of the land, 0.36 km² (0.14 sq mi) or 7.2% is settled (buildings or roads), 0.02 km² (4.9 acres) or 0.4% is either rivers or lakes.

Of the built up area, housing and buildings made up 2.8% and transportation infrastructure made up 2.6%, while parks, green belts and sports fields made up 1.6%. All forested land is covered with heavy forest. Of the agricultural land, 38.6% is used for growing crops and 6.2% is pastures, while 1.6% is used for orchards or vine crops. Of the water in the municipality, 0.2% is in lakes and 0.2% is in rivers and streams.

The former municipality was part of the Aubonne District until it was dissolved on 31 August 2006, and Montherod became part of the new district of Morges.

The former municipality is located on the right bank of the Aubonne river along the road to Col du Marchairuz. It consists of the village of Montherod and several scattered farm houses.

The blazon of the municipal coat of arms is Gules, three Corn Ears Or.

Montherod had a population (as of 2019) of 536. As of 2008^[update], 22.1% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 21.3%. It has changed at a rate of 17.1% due to migration and at a rate of 5.6% due to births and deaths.