10+ Years · San Mateo
Experienced Locksmiths in San Mateo, CA
Experience matters. These locksmiths in San Mateo have years of proven work behind them — and the reviews to back it up.
As of July 2026, RatingsNearMe ranks 6 locksmiths in San Mateo, CA by the RNM Score — a 0–100 rating built from Google ratings, review volume, sentiment, and profile completeness. The top-ranked is A1 Locksmith with a 4.9-star rating from 174 Google reviews and an RNM Score of 85/100. Also in the top tier: Go Pro Locksmith and Diamond Locksmith. The average rating across all listed locksmiths in San Mateo is 4.8 stars from 98 reviews per business on average.
Locksmith services in San Mateo: lockout service $75–$200; rekeying $100–$250; lock installation $150–$400.
Rankings updated July 4, 2026 · RNM Score = ratings (35%), review volume (30%), sentiment (20%), completeness (10%), availability (5%) · Not paid placement.
Best Overall
SARCO'S LOCK WORKS
It is consistently top-ranked in San Mateo for its reliable, professional service and strong local reputation.
Most Reviewed
SARCO'S LOCK WORKS
Having the most reviews reflects broad customer trust and a proven track record of quality service.
Always verify a locksmith's license and request an upfront price estimate to avoid surprises. Local businesses like SARCO'S LOCK WORKS often provide more personalized and trustworthy service than large chains.
Local Market Snapshot
6
Businesses listed
4.8★
Avg rating
98
Avg reviews
Jul 4, 2026
Last updated
Top Rated Locksmiths
San Mateo's top-rated locksmith with 4.9 stars from 174 reviews.
1948 Edinburgh St, San Mateo, CA 94403, USATrusted by hundreds of local customers, this San Mateo locksmith holds a flawless 4.9★ rating.
4039 Transport St Ste.103, Palo Alto, CA 94303, USATrusted by hundreds of customers with a stellar 4.8-star rating.
3 37th Ave #10, San Mateo, CA 94403, USALocksmiths Rankings in San Mateo, CA
| # | Business | Rating | Reviews |
|---|---|---|---|
| #1 | A1 Locksmith1948 Edinburgh St, San Mateo, CA 94403, USA | 4.9★ | 174 |
| #2 | Go Pro Locksmith4039 Transport St Ste.103, Palo Alto, CA 94303, USA | 4.9★ | 128 |
| #3 | Diamond Locksmith3 37th Ave #10, San Mateo, CA 94403, USA | 4.8★ | 118 |
| #4 | KeyMe Locksmiths100 De Anza Blvd, San Mateo, CA 94402, USA | 4.5★ | 50 |
| #5 | San Mateo Lock Works & Safe Center321 2nd Ave, San Mateo, CA 94401, USA | 4.7★ | 116 |
| #6 | SARCO'S LOCK WORKS306 Baldwin Ave, San Mateo, CA 94401, USA | 5.0★ | 4 |
Ranked by verified ratings & review volume · Data from Google Business listings · Updated July 2026
All Locksmiths in San Mateo
4.5 stars from 50 Google reviews, reflecting reliable local locksmith service.
100 De Anza Blvd, San Mateo, CA 94402, USA
Trusted San Mateo locksmith with 4.7 stars from over 100 Google reviews.
321 2nd Ave, San Mateo, CA 94401, USA
Trusted San Mateo locksmith with a perfect 5.0-star rating from 4 reviews.
306 Baldwin Ave, San Mateo, CA 94401, USA
Get Free Quotes
We'll connect you with the top locksmiths in San Mateo, CA.
Locksmiths in San Mateo, CA — Compared
| # | Business | RNM Score | Rating | Reviews |
|---|---|---|---|---|
| 1 | A1 Locksmith | 85/100 | 4.9 ★ | 174 |
| 2 | Go Pro Locksmith | 83/100 | 4.9 ★ | 128 |
| 3 | Diamond Locksmith | 81/100 | 4.8 ★ | 118 |
| 4 | KeyMe Locksmiths | 71/100 | 4.5 ★ | 50 |
| 5 | San Mateo Lock Works & Safe Center | 79/100 | 4.7 ★ | 116 |
| 6 | SARCO'S LOCK WORKS | 67/100 | 5.0 ★ | 4 |
Ranked by RatingsNearMe Score · ratings (35%), review volume (30%), sentiment (20%), completeness (10%), availability (5%) · July 2026
Get your business on AI — ChatGPT, Perplexity & Google AI
AI assistants increasingly recommend local locksmiths straight from RatingsNearMe. Claim your spot in San Mateo to get featured in AI answers, comparison tables, and “best near me” results — where customers are actually searching now.
Frequently Asked Questions — Locksmiths in San Mateo
How do I find the best locksmiths in San Mateo?
Look for businesses with 4.5+ stars, 50+ verified reviews, proper licensing and insurance, and transparent pricing. The top-ranked locksmiths in San Mateo on this page are scored by our algorithm that weighs ratings, review count, and profile completeness.
Are locksmiths in San Mateo licensed and insured?
Licensing requirements vary by trade and state. For most home service contractors, CA requires both a state license and liability insurance. Always ask any contractor for proof of current insurance and a copy of their license number before work begins — you can verify most licenses on your state licensing board's website.
How much do locksmiths charge in San Mateo, CA?
Prices vary by scope, materials, and contractor experience. Use the free quote form on this page to request estimates from multiple local pros simultaneously. Getting 3+ quotes is the single most effective way to avoid overpaying.
What should I look for when hiring a locksmiths in San Mateo?
Verify licensing and insurance, read recent reviews on multiple platforms, ask for a written estimate before work starts, confirm they pull permits when required, and check references from recent local projects. Featured businesses on this page are ranked by verified ratings and review quality.
How are the locksmiths on this page ranked?
Rankings use a transparent algorithm: star rating (35%), review volume (30%), customer sentiment (20%), profile completeness (10%), and availability (5%). Featured Partner listings have paid for enhanced visibility but must still earn their position through real customer reviews — sponsored listings are clearly labeled.
Locksmiths in Nearby Cities
Compare top-rated locksmiths in cities near you.
How Rankings Work on This Page
Every locksmiths on RatingsNearMe is scored transparently: star rating (35%), review volume (30%), customer sentiment (20%), profile completeness (10%), and availability (5%). Businesses labeled exclusive or premium are Featured Partners — they have paid for enhanced visibility but must still rank through real customer reviews. We cap sponsored boosts so bad businesses can never buy the top spot.
Editorial notice: Ratings are based on publicly available data from Google Business listings. Consumers should independently verify licensing, insurance, and credentials before hiring any service provider. Last updated: July 4, 2026.
More Home Services in San Mateo
Related Searches
More ways to find locksmiths in San Mateo
Locksmiths in nearby cities