Usb hub adapters from US brands and US-based sellers
Amazon ranks by what sells fastest, so a usb hub adapter from an established brand gets buried under cheap imports no matter how far you scroll. This page lists the US brands and US-based sellers for usb hub adapters, so you can start from the ones worth trusting.
We read each seller's registered country from Amazon's own published seller info. We don't claim anything here is manufactured in the US, only that you're buying from a US brand or a US-based seller.
Confirmed US brands and sellers
6 listings where Amazon's own seller info places the seller in the US. Each badge says which.

Cable Matters 4-in-1 USB 3.0 Hub with Gigabit Ethernet

IOGEAR USB-C to 4 Port USB-A Hub - USB-C 60W Pass Through - Compatible wi/Thunderbolt 3 - Type-A Port (5Gbps) - GUH3C4PD

Plugable USB C to USB Adapter Hub, 4 Port USB 3.0 Hub, USB Splitter for Laptop, Compatible with Windows, MacBook Pro/Air, iPad Pro, Surface Pro, Chromebook, Linux, Android, Charging Not Supported

Satechi USB-C Hub: 4-in-1 with 100W Pass-Through & 10Gbps USB 3.2 for MacBook, iPad, Surface, Chromebook & More

Anker USB C Hub, 7in1 Multi-Port USB Adapter for Laptop/Mac, 4K@60Hz USB C to HDMI Splitter, 85W Max PD, 2 USB 3.0 & 1 USBC Data Ports, SD/TF Card Reader, for Type C Devices (Charger Not Included)

SABRENT 4-Port Powered USB 3.0 Hub, LED Power Switches (HB-UMP3)
US brands we went looking for
More names an AI suggested for this category that we haven't confirmed US on yet. Each badge says how far we've checked it.

Belkin 4-Port USB 3.0 Hub β SuperSpeed Powered Station with 5β―Gbps Data & Charging, Compact Desktop Adapter for Laptops, iPhone Chargers, Printers, Storage Devices β Black

Kensington CH1200 USB-C 10Gbps 4-Port Hub, USB Type C to USB Adapter with 4 USB 3.0, Compatible with Thunderbolt 4, Thunderbolt 3, USB4 and USB-C Devices (K33616WW)
Suggested, not verified. These names came from an AI suggestion, not from our data. We only call a brand US after checking the seller's registered address on its Amazon seller page. Amazon is the seller on these, so its seller page can't tell us who the brand is.