Rudolf Adolf Wilhelm Ross (Also styled Roß, 22 March 1872 – 16 February 1951) was a German teacher, politician of the Social Democratic Party (SPD), member of the Hamburg Parliament and first Mayor of Hamburg.

Ross was born on 22 March 1872 in Hamburg and became a teacher in 1892.

[1] In 1919, Ross was elected as a member of the Hamburg Parliament and served until 1933.

On 3 March 1933 he resigned from the Hamburg Parliament under protest to the Machtergreifung—the Nazi takeover of power in Weimar Germany on 30 January 1933.

[1] On 16 February 1951, Ross died after a long and severe illness in Hamburg.