 During the 2007–2011 American Community Survey, the city had a per capita income of $17,785 and an average income of $31,649 per household.Omak's 98841 zip code maintained 265 businesses in 2011, with an average payroll of $78,884.The city has a Walmart store, which was built in 1993 as the state's first such store, serving over 60,000 residents.