Here are the best online stores for kitchen and bathroom fixtures in the U.S., with a short note on what each is best for so you can pick the right fit for your project.

1. Home Depot — Best all-around, widest selection, good pricing and local pickup options. Large inventory for faucets, sinks, showers, tubs, toilets and brands from budget to premium; market leader in fixtures. (openbrand.com)

2. Lowe’s — Similar to Home Depot: wide selection, competitive pricing, frequent sales, and convenient in-store pickup/returns. Good for homeowner-friendly brands and installation services. (topconsumerreviews.com)

3. Build.com — Specialty online retailer focused on plumbing, bath and kitchen fixtures. Strong selection of higher-end and specialty brands, helpful product pages/specs and trade pricing for pros. Good if you want detailed options beyond big-box assortments. (coohom.com)

4. Ferguson (Ferguson Bath, Kitchen & Lighting) — Trade-focused supplier with extensive pro-grade inventory, brand authority and access to premium fixtures. Best for contractors or buyers who want professional-grade parts, custom orders and large-project support. (openbrand.com)

5. Wayfair — Broad marketplace with a large assortment (including many budget-to-midrange fixtures), strong search/filters and frequent promotions. Good when you want options at many price points and fast shipping on off-the-shelf items. (Quality/returns vary by seller.) (Wayfair.com)

6. Houzz — Curated selection with design inspiration, reviews and the ability to connect with professionals. Good if you want to shop while pulling together a full design and contractor help. (Houzz.com)

7. Manufacturer direct (Kohler, Moen, Delta, Grohe, Hansgrohe, etc.) — Buying direct gives you the best access to full product lines, warranty support, replacement parts and exclusive finishes. Best for brand-loyal buyers or custom finishes. (Moen, Kohler and others remain top consumer-trusted brands.) (lifestoryresearch.com)

8. Amazon — Huge selection and fast delivery for many plumbing fixtures and accessories; good for basic items, replacement parts and price comparisons. Be careful to confirm seller authenticity and warranty coverage. (openbrand.com)

9. Signature Hardware / FaucetDirect / Specialty independents — These specialty retailers focus on plumbing fixtures, finishes and unique styles; useful for vintage/period fittings, custom finishes or less-common brands. Good for design-focused installs. (topconsumerreviews.com)

Quick shopping tips

• Check warranty and return policy before purchase (fixtures can be heavy or special-order).
• Confirm finish/part numbers and included components (drains, valves, trim) — listings can vary.
• For large or high-end items, factor in freight, delivery protection and assembly/installation support.
• If you plan to hire a plumber, ask if they prefer fixtures from a particular supplier (some pros prefer trade suppliers). (coohom.com)

If you’d like, tell me the type of fixture (faucet, sink, tub, shower system, toilet) and your budget or style (modern, farmhouse, traditional) and I’ll recommend specific stores and product lines or three specific models to consider.