Where is the USB connection on my new iMac

New iMacs have USB-C connections on the back (bottom right side) -- 2 or 4 depending on the model. See the following from iMac 24-inch - Technical Specifications - Apple

2 Thunderbolt / USB 4

2 USB3 and 2 Thunderbolt / USB 4

micki193 wrote:

So it sounds like I’ll need an adapter for a few more USB portals.

Correct, you need a couple of USB-C to USB-A adapters or a Hub.

For the Apple USB-C to USB adapter,

see > USB-C to USB Adapter - Apple

You can also use simple USB-C to USB-A adapters,

see > https://www.amazon.com/dp/B07CVX3516/ref=sspa_dk_detail_0?

I have and use a few of the following Philips adapters with my newer Mac's,

see > https://www.target.com/p/philips-usb-c-to-3-0-usb-a-female-adapter/-/A-79804275

Or a USB-A to USB hub or dock to add additional ports,

see > https://www.amazon.com/s?k=usb-c+to+usb-a+dock