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State Farm® Insurance Agent John Diehl

835 E. Mariposa St.
Altadena, CA 91001-2420

Corner of Mariposa St. and El Molino Ave. one block west of Lake Ave.

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Office Info


835 E. Mariposa St.
Altadena, CA 91001-2420


English, Spanish
About Me

I was born in Whittier, California and raised in Orange County. I attended Oregon State University and graduated with a Bachelor’s Degree in Business and Finance. I obtained my MBA from the University of Southern California. Some weekends, you can find me at our beach cottage in Newport Beach. While there, I enjoy strolling along the boardwalk and around Lido Island. I am an avid collector and repairer of antique clocks that are over 100 years old. I became a State Farm agent to be a business owner and local resource for insurance in the Altadena/Pasadena area. I am passionate about helping local residents and businesses with their insurance needs. My bilingual Spanish team can answer your questions on auto insurance, homeowner insurance, renter’s insurance and life insurance. As a small business owner, we can talk about how I can help your small business. We offer Business Liability, Workers’ Compensation and Error's and Omission Insurance. My team and I help our neighbors by frequenting local restaurants and coffee shops. Each year, I sponsor a youth baseball team with the Altadena Little League. I am also a member of the Pasadena Chamber of Commerce. In Altadena, we are proud to be part of a lively community with a diverse ethnic mix of residents and local businesses for the last 20 years. We strive to have our customers feel that we are members of their family and that they can rely on us to help them with their insurance needs. You can reach us 24/7 by phone, text or online through this site.


Insurance Products Offered

Auto, Homeowners, Condo, Renters, Personal Articles, Business, Life, Health, Pet

Other Products

Banking, Home Loans, Mutual Funds

At State Farm, we offer insurance and financial services with exceptional customer service. Customers can walk-in, call-in or click-in for all their insurance needs. We provide personalized service for Auto insurance, Home insurance, Renters Insurance, Life Insurance and Business Insurance. We are passionate about building customer relationships, being accessible to all customers and being the trusted State Farm agency in the community. Our office is located in Altadena on Mariposa St., on block west of Lake Ave. next to the Altadena Hardware store.

Say hello to our dedicated team - Mirna, Victoria, Reagan and Shannon. We are ready to help you with all your insurance needs. Give us a call or come in for a quote and say hello.

Mirna Serna State Farm Agent Team Member

Mirna Serna

Office Manager

Office Manager for 13 years. I am bilingual Spanish and grew up in Highland Park. I moved to Pasadena with Ivan, my husband and 2 sons, Michael and Mason. I am a huge LA Dodgers and Lakers fan. I enjoy going to the beach and camping with my family.

Shannon Steffes State Farm Agent Team Member

Shannon Steffes

Customer Service Representative

Customer Service Rep with over 28 years experience and thorough knowledge of State Farm systems. I work remotely and live in Irwin, ID with my husband William and 2 children, Madison and Matthew. In my spare time, I enjoy skiing, camping, canoeing and jet skiing.

Arriel Teran State Farm Agent Team Member

Arriel Teran

Account Representative

Victoria Martinez State Farm Agent Team Member

Victoria Martinez

Account Representative