Senate District 21 incorporates Santa Barbara County and a portion of Ventura County. It extends from Santa Maria in the northwest along the 101 corridor and captures Buellton, Solvang, Goleta, Santa Barbara, San Buenaventura, the Santa Clara Valley (Santa Paula, Fillmore, Piru) and Oxnard, Port Hueneme and Camarillo on the southeastern border. It maintains the US-101 transportation corridor throughout the district, as well as the agricultural nexus between the Santa Clara Valley, Oxnard plains, and the Santa Maria area. The district’s blend reunites the western portion of Ventura County with much of the rest of the county below the Conejo Grade.
Map of Senate District 21 (PDF)
2020 Census Population (adj Elec. ß21003 - Swdb 9/27/2021)
| Name | Count | Percent |
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| Total Population (POP) | 1,024,600 | 100.00% |
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| POP Hispanic or Latino | 516,915 | 50.45% |
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| POP Not Hispanic or Latino (NH) | 507,685 | 49.55% |
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| POP NH Population of one race | 471,882 | 46.06% |
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| POP NH White alone | 388,554 | 37.92% |
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| POP NH Black or African American alone | 15,859 | 1.55% |
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| POP NH Asian alone | 57,213 | 5.58% |
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| POP NH American Indian and Alaska Native alone | 3,335 | 0.33% |
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| POP NH Native Hawaiian and Other Pacific Islander alone | 1,642 | 0.16% |
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| POP NH Some Other Race alone | 5,279 | 0.52% |
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| POP NH Population of two or more races | 35,803 | 3.49% |
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2020 Census Housing Occupancy Status
| Name | Count | Percent |
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| Total Housing Units | 358,557 | 100.00% |
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| Occupied | 335,897 | 93.68% |
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| Vacant | 22,660 | 6.32% |
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2020 Census Group Quarters Population (adj Elec. ß21003 - Swdb 9/27/2021)
| Name | Count | Percent |
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| Total Group Quarters Population: | 27,294 | 100.00% |
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| Institutionalized population: | 4,727 | 17.32% |
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| Correctional facilities for adults | 716 | 2.62% |
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| Juvenile facilities | 530 | 1.94% |
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| Nursing facilities/Skilled-nursing facilities | 3,474 | 12.73% |
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| Other institutional facilities | 7 | 0.03% |
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| Noninstitutionalized population: | 22,567 | 82.68% |
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| College/University student housing | 12,765 | 46.77% |
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| Military quarters | 1,356 | 4.97% |
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| Other noninstitutional facilities | 8,446 | 30.94% |
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Counties In District
| Name | Count | Percent |
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| San Luis Obispo | 55,646 | 19.93% |
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| Santa Barbara | 446,704 | 100.00% |
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| Ventura | 522,249 | 61.78% |
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Places In District
| Name | Count | Percent |
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| SAN LUIS OBISPO: Blacklake(U) | 1,016 | 100.00% |
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| SAN LUIS OBISPO: Callender(U) | 1,284 | 100.00% |
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| SAN LUIS OBISPO: Grover Beach(C) | 12,739 | 100.00% |
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| SAN LUIS OBISPO: Los Berros(U) | 625 | 100.00% |
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| SAN LUIS OBISPO: Nipomo(U) | 18,222 | 100.00% |
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| SAN LUIS OBISPO: Oceano(U) | 7,218 | 100.00% |
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| SAN LUIS OBISPO: Woodlands(U) | 1,933 | 100.00% |
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| SAN LUIS OBISPO: Remainder of San Luis Obispo(R) | 12,609 | 34.03% |
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| SANTA BARBARA: Ballard(U) | 769 | 100.00% |
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| SANTA BARBARA: Buellton(C) | 5,175 | 100.00% |
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| SANTA BARBARA: Carpinteria(C) | 13,293 | 100.00% |
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| SANTA BARBARA: Casmalia(U) | 150 | 100.00% |
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| SANTA BARBARA: Cuyama(U) | 37 | 100.00% |
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| SANTA BARBARA: Eastern Goleta Valley(U) | 28,693 | 100.00% |
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| SANTA BARBARA: Garey(U) | 74 | 100.00% |
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| SANTA BARBARA: Goleta(C) | 32,754 | 100.00% |
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| SANTA BARBARA: Guadalupe(C) | 8,075 | 100.00% |
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| SANTA BARBARA: Isla Vista(U) | 15,513 | 100.00% |
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| SANTA BARBARA: Lompoc(C) | 41,866 | 100.00% |
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| SANTA BARBARA: Los Alamos(U) | 1,842 | 100.00% |
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| SANTA BARBARA: Los Olivos(U) | 1,203 | 100.00% |
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| SANTA BARBARA: Mission Canyon(U) | 2,544 | 100.00% |
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| SANTA BARBARA: Mission Hills(U) | 3,585 | 100.00% |
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| SANTA BARBARA: Montecito(U) | 8,648 | 100.00% |
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| SANTA BARBARA: New Cuyama(U) | 546 | 100.00% |
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| SANTA BARBARA: Orcutt(U) | 32,094 | 100.00% |
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| SANTA BARBARA: Santa Barbara(C) | 88,928 | 100.00% |
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| SANTA BARBARA: Santa Maria(C) | 110,135 | 100.00% |
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| SANTA BARBARA: Santa Ynez(U) | 4,512 | 100.00% |
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| SANTA BARBARA: Sisquoc(U) | 191 | 100.00% |
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| SANTA BARBARA: Solvang(C) | 6,135 | 100.00% |
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| SANTA BARBARA: Summerland(U) | 1,224 | 100.00% |
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| SANTA BARBARA: Toro Canyon(U) | 1,836 | 100.00% |
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| SANTA BARBARA: University of California-Santa Barbara(U) | 9,715 | 100.00% |
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| SANTA BARBARA: Vandenberg AFB(U) | 3,566 | 100.00% |
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| SANTA BARBARA: Vandenberg Village(U) | 7,322 | 100.00% |
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| SANTA BARBARA: Remainder of Santa Barbara(R) | 16,279 | 100.00% |
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| VENTURA: Camarillo(C) | 70,850 | 100.00% |
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| VENTURA: Channel Islands Beach(U) | 2,878 | 100.00% |
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| VENTURA: El Rio(U) | 7,069 | 100.00% |
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| VENTURA: Fillmore(C) | 16,462 | 100.00% |
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| VENTURA: Meiners Oaks(U) | 3,921 | 100.00% |
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| VENTURA: Mira Monte(U) | 6,631 | 100.00% |
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| VENTURA: Oak View(U) | 6,229 | 100.00% |
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| VENTURA: Ojai(C) | 7,653 | 100.00% |
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| VENTURA: Oxnard(C) | 202,614 | 100.00% |
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| VENTURA: Piru(U) | 2,592 | 100.00% |
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| VENTURA: Port Hueneme(C) | 22,029 | 100.00% |
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| VENTURA: San Buenaventura (Ventura)(C) | 111,008 | 100.00% |
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| VENTURA: Santa Paula(C) | 30,772 | 100.00% |
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| VENTURA: Saticoy(U) | 1,134 | 100.00% |
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| VENTURA: Remainder of Ventura(R) | 30,407 | 82.34% |
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