Bremblens is a municipality in the Swiss canton of Vaud, located in the district of Morges.
Bremblens is first mentioned in 1177 as Bremblens.
Bremblens has an area, , of . Of this area, or 68.6% is used for agricultural purposes, while or 20.3% is forested. Of the rest of the land, or 12.1% is settled (buildings or roads), or 0.7% is either rivers or lakes.
Of the built up area, housing and buildings made up 6.6% and transportation infrastructure made up 4.1%. Out of the forested land, 19.0% of the total land area is heavily forested and 1.4% is covered with orchards or small clusters of trees. Of the agricultural land, 55.2% is used for growing crops and 3.4% is pastures, while 10.0% is used for orchards or vine crops. All the water in the municipality is flowing water.
The municipality was part of the Morges District until it was dissolved on 31 August 2006, and Bremblens became part of the new district of Morges.
The municipality is located between the Venoge and Morges rivers.
The blazon of the municipal coat of arms is Per fess, 1. Argent, an eagle displayed Gules; 2. Gules a wavy bar Argent.
Bremblens has a population () of . , 13.0% of the population are resident foreign nationals. Over the last 10 years (1999–2009 ) the population has changed at a rate of 37%. It has changed at a rate of 29.7% due to migration and at a rate of 8.5% due to births and deaths.
Most of the population () speaks French (312 or 86.7%), with German being second most common (20 or 5.6%) and English being third (7 or 1.9%). There are 4 people who speak Italian.
Of the population in the municipality 82 or about 22.8% were born in Bremblens and lived there in 2000. There were 162 or 45.0% who were born in the same canton, while 61 or 16.9% were born somewhere else in Switzerland, and 44 or 12.2% were born outside of Switzerland.
In there were 5 live births to Swiss citizens and 1 birth to non-Swiss citizens, and in same time span there were 2 deaths of Swiss citizens. Ignoring immigration and emigration, the population of Swiss citizens increased by 3 while the foreign population increased by 1.