Isaac Newton Roop (March 13, 1822 – February 14, 1869) was an American politician, pioneer, and member of the Whig Party.

[1] In 1851, the guide William Nobles started taking settlers, including the 29-year-old Isaac Roop and his family, over a route through the Sierra Nevada passing through the Honey Lake valley.

Roop's first three years in California were spent in Shasta County in farming and trading.

It was then that Roop retreated to the Sierra Nevada and to Honey Lake, where he concentrated on his own backcountry holdings and nearly single-handedly erected the burg of Rooptown, which he would later name for his daughter Susan.

[1] There is a mural depicting father and daughter in Uptown Susanville on the outside wall of Johnson's Shoes.