Rosario Diaz is a first generation American born in San Antonio Texas of Mexican Immigrant parents. Her family moved to California when she was 5 and she began her education at Ford Avenue Elementary School in East Los Angeles. She graduated from Pioneer High School and attended both Rio Hondo Community College and UCLA extension.
Rosario has been married to her husband for over 20 years and has one son, two daughters, and four grandchildren. She loves animals and adopted both of her dogs from kill shelters. She loves America, supports our brave men and women in uniform, and holds great affection for our Military Veterans.
Rosario worked as a government Auditor for almost 10 years and later was selected to attend the prestigious Federal Law Enforcement Training Center (FLETC) in Brunswick, Georga.
Upon graduation, she was sworn in as a Special Agent for the US TREASURY and was assigned to the Los Angeles Field Office. She worked there in many capacities, conducting complex criminal investigations of major tax fraud cases, working undercover, and acting as a Team Leader on search warrants. She served as an elite member of HIDTA (High Intensity Drug Trafficking Area – Los Angeles) and faced many dangerous criminals at gunpoint. After serving over 20 years as a Special Agent, she was honorably retired from Federal Law Enforcement in 2015 with over 33 years of total service to her country.
In 2020, with no political experience, no endorsements, and very little money, Rosario threw her hat into the ring as a Candidate for the West Covina City Council. During that campaign, she walked over 150 miles and knocked on the doors of over 5,000 voters and was later elected in a landslide victory to represent the people of the 3rd District.
Since then, she provided the leadership for a $1,500,000 beautification project on the center medians of the Azusa Avenue corridor with Federal Grant money without spending one dime from the city’s general fund. She also led the way for the placement of 105 solar powered L.E.D. Flashing Stop Signs increasing the safety of drivers and pedestrians in dangerous 4-way intersections; she was also involved in the planning of the new West Covina Monument Signs located at freeway offramps.
Rosario holds the freedoms guaranteed in our Constitution dear to her heart. She strongly supports the 1st and 2nd Amendments and proudly hosted the first Mayor’s Prayer Breakfast, bringing together many diverse religious leaders lifting West Covina and our Nation up in prayer.
Councilwoman Diaz takes great pride in West Covina being a “Full Service” city. She was endorsed in her reelection campaign in 2024 by the West Covina Police Officers Association (POA) as well as the West Covina Fire Fighters Association (FFA).
While neighboring cities have switched over to county services, she maintains unwavering support for our men and women in public safety and is steadfast in her commitment to our independent Police and Fire Departments.
Rosario is a dedicated daughter and holds our senior citizens in high regard and tirelessly advocates for them.
In 2023, West Covina celebrated its milestone Centennial year, and Councilwoman Diaz was elevated to become the first Mexican American Woman to serve as Mayor in the 100-year history of the city. In 2024, voters overwhelmingly reelected her to office by a wide margin, and she is humbled by the trust and confidence they have placed in her.
In 2025, she was named Woman of the Year by the California State Assembly for her 38 years of ongoing public service. Rosario believes that the Constitution should be the guide for every decision made by the government, and she votes accordingly. She is a proud taxpayer advocate whose goal is to be a good steward for the city’s tax dollars and financial resources. She is immensely proud of this Jewel of the San Gabriel Valley as West Covina begins its next 100 years, continuing as an Education Destination, and THE PLACE to start a business, raise a family, and own a home.
In her spare time, Rosario enjoys her family and four grandchildren. She likes to hike and ride her bicycle, and her hobbies include cooking, baking, and improving her mid-century ranch style home. She has travelled all over these United States and the world, including Canada, Mexico, Italy, Thailand, Taiwan, and China.
Rosario is strong in her faith, loves her Lord, believes in the power of prayer, and is an active member of her church (Proverbs 31:25).
Councilwoman Diaz prides herself at being responsive to her constituents and can be reached by email at rosario.diaz@westcovina.org or by telephone at (626) 430-8925.