2022 Primary Election Geographic Data

From this page you can download precinct boundary files and geographic conversion files for the 2020 Primary Election.

Descriptions of each of these files can be found by following the links below. Please note that the BLK files on this page are based on U.S. Census Bureau 2010 TIGER/Line census blocks.

Precinct types

MPREC: Geography for registration precincts, corresponding with RRPREC tabular data. RRPREC data aggregate the original reported registration data (RGPREC data) into these MPREC geographic precincts.
SRPREC: Consolidation of registration (RR) and voting (SV) precincts. Both registration and voting data are available as SRPREC tabular datasets.

Boundary file types

_CDF: .cdf file format. Compatible with Maptitude by Caliper GIS software.
_MIF: .mif file format. Compatible with MapInfo by Pitney Bowes GIS software.
_SHP: .shp file format. Compatible with any ArcGIS program by ESRI. Many open source and low cost GIS platforms are able to view or open the .shp file type.

Data conversion file descriptions

SRPREC to 2010 BLK: SR precinct to 2010 block conversion files delimited with fields SR precinct, block, and share of precinct.
2010 BLK to MPREC: 2010 block to map precinct conversion files delimited with fields block, precinct, share of block, and share of precinct. Please note that the share of precinct is not a reliable measure. Please use the MP_BLK or SSP_BLK files instead.
MPREC to SRPREC: Map precinct to SR precinct conversion files delimited with fields MPREC and SRPREC.
SRPREC to CITY: SR precinct to city conversion files delimited with fields SRPREC, city, n_in_city, and n…

File downloads by county: map precincts, SR precincts, and data conversion.
County or region	MAP PRECINCTS	SR PRECINCTS	DATA CONVERSION
California Statewide	MPREC_SHP	SRPREC_SHP	SRPREC to 2020 BLK RGPREC to 2020 BLK MPREC to SRPREC RG to RR to SR to SVPREC SRPREC to CITY
County 001 (Alameda)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 003 (Alpine)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 005 (Amador)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 007 (Butte)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 009 (Calaveras)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 011 (Colusa)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 013 (Contra Costa)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 015 (Del Norte)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 017 (El Dorado)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 019 (Fresno)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 021 (Glenn)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 023 (Humboldt)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 025 (Imperial)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK no data yet RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 027 (Inyo)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 029 (Kern)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 031 (Kings)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 033 (Lake)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 035 (Lassen)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK no data yet RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 037 (Los Angeles)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 039 (Madera)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 041 (Marin)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 043 (Mariposa)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 045 (Mendocino)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 047 (Merced)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK no data yet RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 049 (Modoc)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 051 (Mono)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 053 (Monterey)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 055 (Napa)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 057 (Nevada)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 059 (Orange)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 061 (Placer)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 063 (Plumas)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 065 (Riverside)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 067 (Sacramento)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 069 (San Benito)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 071 (San Bernardino)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 073 (San Diego)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK no data yet no data yet no data yet SRPREC to CITY
County 075 (San Francisco)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 077 (San Joaquin)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 079 (San Luis Obispo)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 081 (San Mateo)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 083 (Santa Barbara)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 085 (Santa Clara)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 087 (Santa Cruz)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 089 (Shasta)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK no data yet RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 091 (Sierra)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 093 (Siskiyou)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 095 (Solano)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 097 (Sonoma)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 099 (Stanislaus)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 101 (Sutter)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 103 (Tehama)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 105 (Trinity)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK no data yet RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 107 (Tulare)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 109 (Tuolumne)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 111 (Ventura)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 113 (Yolo)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY
County 115 (Yuba)	MPREC_CDF MPREC_MIF MPREC_SHP	SRPREC_CDF SRPREC_MIF SRPREC_SHP	SRPREC TO 2020 BLK RGPREC TO 2020 BLK 2020 BLK TO MPREC RG to RR to SR to SVPREC no data yet SRPREC to CITY