Robert Perkins Bass (September 1, 1873 – July 29, 1960) was an American farmer, forestry expert, and Republican politician from Peterborough, New Hampshire.

That year, he had supported Theodore Roosevelt for president, in the breakaway Progressive Party, against the Republican incumbent, William Howard Taft.

Bass is remembered today for his stint as chairman of the New Hampshire Forestry Commission when popular concern with forests' well-being was intense because of extreme overlogging in the White Mountains.

Also notable is his sponsorship of legislation that led to the first direct primary law east of the Mississippi River.

In 1945, Bass, along with retired Supreme Court Associate Justice Owen J. Roberts, convened the assembly that produced the Dublin Declaration, which proposed the transformation of the United Nations General Assembly into a world legislature with "limited but definite and adequate power for the prevention of war.