Industries The most common industries in Lassen County, CA by number of employees are Public Admin.; Healthcare & Social Assistance; and Retail trade. Compared to other counties, Lassen County, CA has an unusually high number of Public Admin.; Agriculture, Forestry, Fishing, Hunting; and Utilities. The highest paying industries in Lassen County, CA, by median earnings, are Utilities; Agriculture, Forestry, Fishing, Hunting; and Finance & Insurance. For more information on Lassen County industries, please visit the Lassen County Chamber of Commerce website or contact their office at (530) 257-4323. Photo courtesy James Q. Eddy, Jr.