Romanzo Norton Bunn (September 24, 1829 – January 25, 1909) was an American lawyer and judge.

Born in South Hartwick, New York, Bunn read law to enter the bar in 1853.

[1][2] On October 25, 1877, Bunn was nominated by President Rutherford B. Hayes to a seat on the United States District Court for the Western District of Wisconsin vacated by Judge James C. Hopkins.

Bunn was confirmed by the United States Senate on October 30, 1877, and received his commission the same day.

His former home there is located in what is now the Langdon Street Historic District.