In a change from years past, all candidates will be on one ballot, regardless of political affiliation. The top two vote-getters - even if from the same party - will advance to the general election Nov. 6.
Also, the primary is the first election since the 14-member California Citizens Redistricting Commission approved new district maps last summer.
Filing for two races has been extended until Wednesday -- the 1st District for the San Bernardino County Board of Supervisors and Loma Linda City Council. Both races had an incumbent not running which by state law extends the filing period three days.
Many incumbents will likely have a smooth road to Election Day on Nov. 6 as they face candidates who either aren't as well funded or don't have the necessary name recognition. But other primary races are expected to be very competitive, such as Congressional Districts 8 and 31.
Eleven people filed to run in House District 8, including well-known politicos Assemblyman Paul Cook, R-Yucaipa, former Republican Assemblyman Anthony Adams, San Bernardino County Supervisor Brad Mitzelfelt as well as Victorville Mayor Ryan McEachron and City Councilwoman Angela Valles. The district runs along the Nevada border and south and east from Bridgeport to Needles and the Colorado River.
The impact of this year's new primary system could also be seen in the 31st House district, where Republican mainstays Rep. Gary Miller, R-Brea, and Assemblyman Bob Dutton, R-Rancho Cucamonga, will face a difficult road to Nov. 6. The two established Republicans will face four other challengers, including Redlands Mayor Peter Aguilar. District 31 stretches from Upland through San Bernardino and into Redlands.
Here is a listing as of Saturday morning of the candidates who filed papers by Friday's deadline. It is not clear whether the respective registrars of voters have completed processing all of the last-minute papers, and some changes may be announced later:
Assembly District 33
District encompasses most of San Bernardino County with the exception of its southwest corner and the Morongo Basin.
Assembly District 40
District extends from Rancho Cucamonga to part of the High Desert through San Bernardino and into Redlands.
Assembly District 41
District includes Upland, Claremont, La Verne and San Dimas, much of the San Gabriel Mountains and Pasadena.
Assembly District 47
District includes Rialto, Bloomington, Colton, Grand Terrace and parts of Fontana.
Joe Baca Jr.
Assembly District 52
District includes Pomona, Chino, Ontario and Montclair.
Paul Vincent Avila
Assembly District 55
District takes in Chino Hills, the southeast corner of the San Gabriel Valley and a portion of Orange County.
Senate District 23
This oddly shaped district includes Rancho Cucamonga, a portion of the High Desert, the city of San Bernardino, the San Bernardino Mountains as well as a portion of Riverside County.
Senate District 25
District is made up of mostly foothill communities from La Canada Flintridge to Upland. District includes Burbank, Glendale, Monrovia, Glendora, San Dimas, La Verne, Claremont and Upland.
Senate District 29
District runs from the southeast corner of the San Gabriel Valley to Chino Hills and also includes a corner of Orange County.
Congressional District 8
District along the Nevada border runs south and east from Bridgeport to Needles and the Colorado River.
Congressional District 27
District includes Upland, Claremont, Glendora and the Pasadena area.
Congressional District 31
District is a narrow district that stretches from Upland through San Bernardino and into Redlands.
Congressional District 32
Includes La Verne, San Dimas and most of the San Gabriel Valley.
Congressional District 35
District includes parts of Pomona, Montclair, Chino, Ontario, Fontana and Bloomington.
Joe Baca Sr.
Gloria Negrete McLeod
Congressional District 39
District is mostly made up of the southeast corner of the San Gabriel Valley and a portion of Orange County between Buena Park and Yorba Linda.
San Bernardino County
First Supervisorial District
District includes the High Desert, including Barstow, as well as Yucaipa, Redlands and parts of San Bernardino.
Russell E. Blewett
Third Supervisorial District
District includes part of the High Desert, part of the San Bernardino Mountains as well as part of San Bernardino.
Fifth Supervisorial District
District includes parts of Fontana and Rialto.
Note: Elections for odd-numbered new state Senate districts are set for 2012 and for even-numbered districts in 2014.
Reach Benjamin via email, call him at 909-483-9370, or find him on Twitter @ivdbben.