The district is based in the Inland Empire, including the communities of Chino, Eastvale, Fontana, Montclair, Ontario, Pomona, Rancho Cucamonga, and Upland.

They are partitioned by Highway 60, Phillips Ranch Rd, E Village Loop Rd, Quail Creek Ln, Falcon Ridge Dr, Hidden Valley Rd, Oak Cliff Dr, Willowbrook Ln, Westbrook Ln, La Sierra Dr, Avenida Rancheros, Rancheros Navato Dr, Serra Dr, Alta Mira Pl, Rancho Laguna Dr, W Mission Blvd, W Temple Ave, Pomona Blvd, Valley Blvd, San Bernardino Freeway, Walnut City Parkland, San Bernardino Freeway, Fairplex Dr, Via Verde, Puddingstone Reservoir, McKinley Ave, N Whittle Ave, Arrow Highway, Fulton Rd, Foothill Blvd, Towne Ave, Harrison Ave, Carnegie Ave, W Arrow Highway, Mountain Ave, and E American Ave.

The 35th district takes in Chino, Montclair, Ontario, and the south sides of Rancho Cucamonga, Fontana, and Upland, as well as the Los Serranos neighborhood of Chino Hills.

They are partitioned by Chino Creek, Santa Ana River, Chandler St, Archibald Ave, Schleisman Rd, Scholar Way, Citrus Way, Hamner Ave, Corona Freeway, and E Philadelphia St.

The district was composed of parts of the Westchester District of the City of Los Angeles and the cities of Inglewood, Hawthorne, Gardena and Florence-Graham, as well as some adjacent areas.