With 38,921 new declarations in 2018, legal cohabitations are rather stable (-0.3 % compared to 2017). However, terminations of legal cohabitations are on the rise (+4.4 %).

There is a slight increase in the average duration of cohabitation: from 4.3 years in 2017 to 4.6 years the following year. Marriage remains the first cause of legal cohabitation termination.

Most couples are formed around the age of 30

In 2018, it is still around the age of thirty that single partners enter into legal cohabitation for the first time, on average at 31.4 years for the first cohabitant and 29.4 years for the second. The age difference in the couple does not vary: 2 years