|— City —|
|Nickname(s): Thunderegg Capital of the World|
|Motto: Gateway to the Oregon Trail|
|• Mayor||Harry Flock|
|• Total||1.55 sq mi (4.01 km2)|
|• Land||1.55 sq mi (4.01 km2)|
|• Water||0 sq mi (0 km2)|
|Elevation||2,192 ft (668 m)|
|• Estimate (2011)||3,239|
|• Density||2,107.7/sq mi (813.8/km2)|
|Time zone||Mountain (UTC-7)|
|• Summer (DST)||Mountain (UTC-6)|
|GNIS feature ID||1124870|
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 far eastern Oregon known as the "Treasure Valley". It is part of the Ontario, OR–ID Micropolitan Statistical Area.
The primary industry in the region is agriculture, including the cultivation of Russet potatoes, sugar beets, onions, corn, flower seed, mint, and wheat. The city's economy relies on the surrounding agricultural area with its several large onion and potato packaging plants.
The area surrounding the city was originally inhabited by Native Americans. Northern Paiute and Cayuse frequented the area but had difficulty living in the relatively harsh climate. The original Fort Boise, established in the 1830s, is nearby to the southeast. The city was originally a shipping center for sheep and stock on the Union Pacific's main trunk line.
Experiments with growing sugar beets were begun in 1935 by R. H. Tallman, the Idaho district manager 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 , on both the Union Pacific Railroad lines and along U.S. Route 20.
Near the end of World War II, a branch camp for German and Italian prisoners of war from Camp Rupert, near Buhl, Idaho, was established. Those POWs helped with the sugar beet industry, typically through thinning and harvesting. The reason for closure is due to the fact that Idaho owners did not like the union and in Oregon they were forced to join. The Nyssa plant just a few year previously produced more sugar than anywhere for Amalgamated Sugar. To date the plant has been stripped of everything except the brown sugar line. The closure of this factory devastated Nyssa and its people. The mechanic shop is still running. Beets are shipped to Nampa, Idaho. Nyssa also had a greenhouse and testing facilities which were later moved to Twin Falls, Id.
2010 census 
As of the census of 2010, there were 3,267 people, 1,051 households, and 758 families residing in the city. The population density was 2,107.7 inhabitants per square mile (813.8 /km2). There were 1,153 housing units at an average density of 743.9 per square mile (287.2 /km2). The racial makeup of the city was 63.1% White, 0.3% African American, 0.7% Native American, 1.3% Asian, 30.9% from other races, and 3.8% from two or more races. Hispanic or Latino of any race were 60.5% of the population.
There were 1,051 households out of which 45.1% had children under the age of 18 living with them, 50.0% were married couples living together, 14.2% had a female householder with no husband present, 7.9% had a male householder with no wife present, and 27.9% were non-families. 24.5% of all households were made up of individuals and 13% had someone living alone who was 65 years of age or older. The average household size was 3.08 and the average family size was 3.71.
The median age in the city was 30.1 years. 34.5% of residents were under the age of 18; 9.3% were between the ages of 18 and 24; 23.7% were from 25 to 44; 19.3% were from 45 to 64; and 13.1% were 65 years of age or older. The gender makeup of the city was 50.1% male and 49.9% female.
- "City Council". Retrieved 24 May 2010.
- "US Gazetteer files 2010". United States Census Bureau. Retrieved 2012-12-21.
- "American FactFinder". United States Census Bureau. Retrieved 2012-12-21.
- "Population Estimates". United States Census Bureau. Retrieved 2013-01-04.
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.
- "US Board on Geographic Names". United States Geological Survey. 2007-10-25. Retrieved 2008-01-31.
- Bachman, J. R. (1962). Story of the Amalgamated Sugar Company, 1897-1961. Caldwell, Idaho: Caxton Printers. OCLC 18047844.
- Jaehn, Tomas (2000-08). "Unlikely Harvesters: German Prisoners of War as Agricultural Workers in the Northwest". Montana: The Magazine of Western History (Montana Historical Society) 50 (3): 46–57. JSTOR 4520253.
- Cockle, Richard (2005-10-30). "Nyssa feels bare without bustle of beets". The Oregonian. pp. C04.
- Cockle, Richard (2001-01-25). "SWEET ON SUGAR BEETS". The Oregonian. pp. D02.