Nyssa is a city in Malheur County, Oregon, United States. The population was 3,267 at the 2010 census. The city is located along the Snake River on the Idaho border, in the region of in the distance eastern Oregon known as the “Treasure Valley”. It is share of the Ontario, OR–ID Micropolitan Statistical Area.

The primary industry in the region is agriculture, including the gardening of Russet potatoes, sugar beets, onions, corn, flower seed, mint, and wheat. The city’s economy relies upon the surrounding agricultural area with its several large onion and potato packaging plants.

The Place surrounding the city was originally inhabited by Native Americans. Northern Paiute and Cayuse frequented the Place but had mysteriousness living in the relatively unfriendly climate. The indigenous Fort Boise, established in the 1830s, is manageable to the southeast. The city was originally a shipping center for sheep and stock on the Union Pacific’s main trunk line.

Experiments as soon as growing sugar beets were begun in 1935 by R. H. Tallman, the Idaho district executive of the Amalgamated Sugar Company. Successful yields led to the first Amalgamated-designed and built factory, which began operation on October 9, 1938. The factory was located at 43°52′31″N 116°59′26″W / 43.875298°N 116.990629°W / 43.875298; -116.990629, on both the Union Pacific Railroad lines and along U.S. Route 20.