Yeah, provided you are doing a business in Stanfield, Oregon and then you usually require a business license or permit. The majority of businesses are required to register with the City of Stanfield and to also adhere to the regulations of Umatilla County and Oregon state regulations.
A local business registration is generally required even in the case of home based or small businesses. The best thing is to contact the Stanfield City Hall or their official web site in order to ascertain the exact requirements of your type of business.