[1][4] After redistricting, the district picked up agricultural areas of Monterey County, and its median household income dropped substantially, to $90,456.

The 18th district was moved to cover the Salinas Valley in Monterey County and the downtown and east side of San Jose.

Cities in the district included Modesto, most of Stockton, Ceres, Atwater, Merced, and Los Banos.

They are partitioned by Pajaro River, Highway 129, W Beach St, Lee Rd, Highway 1, Harkins Slough Rd, Harkins Slough, Old Adobe Rd, Corralitos Creek, Varin Rd, Pioneer Rd, Green Valley Rd, Casserly Rd, Mt Madonna Rd.

It also takes in the cities of Morgan Hill and Gilroy and the census-designated places East Foothills and San Martin.