Due to her interest in educational matters she was co-opted onto the London Education Committee by the Progressive majority in 1905, serving as on that body until she was elected to it following the 1910 London County Council election.

However, there was a legal challenge made by one of the defeated Conservative candidates and as a result, neither of the women were able to take their seats.

Adler was one of two women who were elected, as one of the representatives for the constituency of Hackney Central in 1910.

In March 1913 she was re-elected, although her running mate lost to the Municipal Reform Party; In March 1919, following the end of the war, the boundaries for her constituency were slightly altered and she was returned unopposed due to an electoral agreement of the Progressive and Municipal Reform parties to only adopt one candidate each; In March 1922 the electoral arrangement between the Progressive and Municipal Reform parties continued; From 1922 to 1923 she served as deputy chair of the London County Council.

Despite her election defeat in 1931, she was co-opted onto the London County Council Public Health Committee for a three-year term.