Oregon's farm acreage totaled 16.3 million in 2012, with 35,439 farms and 59,237 farm operators. Of these, 39 percent were women farm operators. These results and more are available from the U.S. Department of Agriculture's report, 2012 Census of Agriculture.
The purpose of the census of agriculture is to account for "any place from which $1,000 or more of agricultural products were produced and sold, or normally would have been sold, during the census year." Oregon agricultural product sales totaled $4.9 billion in 2012 and ranged from a high of $593 million in Marion County to $5.5 million in Lincoln County.
Crop sales in 2012 raised $3.2 billion or about 66 percent of Oregon's $4.9 billion agricultural product sales total (see graph below).
From much more on Oregon's agriculture industry, including farm production and value, livestock, and agricultural employment, read Dallas Fridley's full article: Down on the Farm - 2012 Census of Agriculture for Oregon