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Profile photo of a State Farm Agent named: John Diehl
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

Office Hours

9am - 5:30pm
After Hours by Appointment
Call us 24 hours a day!


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


English, Spanish

*** Spring into the new season with Life Insurance. Call, text or email us for a Life Insurance quote today! ***

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 Auto insurance, Life insurance, Hospital Insurance and Professional Liability insurance needs. In addition, we offer Pet Insurance and Retirement services. My bilingual Spanish team can answer your questions on all your insurance needs. As a small business owner, we can talk about how I can help your small business. My team and I help our neighbors by frequenting local restaurants and coffee shops and by 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 mix of residents and local businesses for the last 20 years. 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, Mutual Funds

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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, Motorcycle Insurance, Recreation Vehicle Insurance, Life Insurance, Pet Insurance and Financial Services. 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, Arriel, Diana 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 15 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 30 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

I graduated from California State University Northridge and have worked over 3 years in the insurance industry. I grew up in Pasadena, live with my husband Larry and our Siamese cat named Blue. I enjoy cycling and cooking new recipes with my husband.

Diana Ibarra State Farm Agent Team Member

Diana Ibarra

Customer Service Representative

Diana has rejoined our office as our Customer Service Rep. She worked for us several years ago.