Esther Alder (born 1958 in Solothurn) is a Swiss politician.

[1][2] Having moved to Geneva at nine years old, Alder continued her education there, which she had started in the canton of Solothurn.

In 1995 she was elected to the legislative municipal council of the city of Geneva.

She left the assembly in 1997 when she was elected deputy to the Grand Council of Geneva, a position she held for twelve years.

She was elected to the administrative council of Geneva in 2011 where she headed the Department of Social Cohesion and Solidarity.