Updated October 2026 · Our Recommended Top 17
Our goal is to connect people with the best local professionals. We scored Ontario plumbers on more than 25 variables across five categories and analyzed the results to give you a hand-picked list of the best.
= Featured Provider
Best Plumber matching for Ontario
Not sure which plumber to call? Tell us the job. We check the shortlist above against your timeline and budget and connect you with the right one, free.
Mon–Fri 6am–4pm PT · Operated by BaaDigi
Review sources · Google 5.0 (527)
Review sources · Google 5.0 (582)
Review sources · Google 5.0 (210)
Review sources · Google 4.9 (1,786)
Best Plumbers Serving Ontario
5623 E Arrow Hwy, Montclair, CA 91763
Review sources · Google 4.9 (992)
Best Plumbers Serving Ontario
10970 Arrow Route #104, Rancho Cucamonga, CA 91730
Review sources · Google 4.9 (375)
Best Plumbers Serving Ontario
8222 Foothill Blvd, Rancho Cucamonga, CA 91730
Review sources · Google 4.9 (797)
Review sources · Google 4.9 (338)
Best Plumbers Serving Ontario
3200 E Guasti Rd Ste 100-G, Ontario, CA 91761
Review sources · Google 5.0 (130)
Best Plumbers Serving Ontario
2311 E Locust St, Ontario, CA 91761
Review sources · Google 4.8 (9,022)
Best Plumbers Serving Ontario
9447 London Way #102, Rancho Cucamonga, CA 91730
Review sources · Google 4.8 (8,265)
Best Plumbers Serving Ontario
1131 W 6th St Ste 209, Ontario, CA 91762
Review sources · Google 4.8 (1,472)
Best Plumbers Serving Ontario
10722 Arrow Route Ste 602, Rancho Cucamonga, CA 91730
Review sources · Google 4.8 (3,016)
Review sources · Google 4.8 (588)
Best Plumbers Serving Ontario
Review sources · Google 4.9 (88)
Review sources · Google 5.0 (62)
Review sources · Google 4.6 (604)
We pull every plumber we can find serving Ontario, then score each on five things: availability and service area, licensing and credentials, reputation across review sites, experience, and how they handle a real phone call. Only the top scorers make the list. Featured Providers pay for placement and are labeled; scores are never for sale.
Yes. Call or send the form and we match you with a plumber from this list at no cost. Featured Providers may pay RatingsMatch for placement, which is why they are labeled.
Listings are earned, not bought. Claim your business at https://www.ratingsmatch.com/claim to correct details and add services. Featured placement is a separate paid option that never changes a rating.