Jonathan Earle Arnold (February 4, 1814 – June 2, 1869) was an American lawyer and politician.

He was a member of the Council of the Wisconsin Territory and district attorney of Milwaukee County.

[3][1] Arnold served in the Wisconsin Territorial Council from 1840 to 1841 as a member of the Whig Party.

During the Wisconsin Territory period, he also served as Milwaukee County District Attorney and ran unsuccessfully for congress.

[4][1] As a lawyer, he successfully defended Judge Levi Hubbell in his 1853 impeachment trial, and he was a member of the legal team for William A. Barstow in the contest over the results of the 1855 Wisconsin gubernatorial election.