Washington’s Yakima – Pasco – Richland – Kennewick metropolitan area contains ZIP Code 99350. Benton County is the main location of ZIP code 99350. Additionally, 99350 has parts in Klickitat County. PROSSER, Washington is the name given to 99350 by the US Postal Service. Parts of ZIP code 99350 are located inside or close to Prosser, Washington. 99350 has the area code 509 as its prefix. In comparison to other zipcodes in Washington, 99350 might be categorised socioeconomically as a Lower Middle Class class.
99350 currently has a 3.9% unemployment rate, which is higher than the current state unemployment rate of 3.7% and lower than the current county unemployment rate of 6.5%.

The population of 99350 grew to 12979 from 11399 according to the 2010 US Census. While Hispanics make up the majority of the population in 99350, they also make up the majority of students in its public schools. In 99350 public schools, 64.5% of students participate in or are eligible for free or reduced meal programmes.