They possibly could.  If you are worried about this, you could use tor to hide your ip.

Location data could be embedded in the notes you upload to Nostr through image metadata so I would be careful of that as well.

Ask_SN

Does Nostr relays store user-specific information like IP address?

macarena

They possibly could.  If you are worried about this, you could use tor to hide your ip. 
If you use a Nostr website, use [tor browser](https://www.torproject.org/) to hide your ip.

Location data could be embedded in the notes you upload to Nostr through image metadata so I would be careful of that as well.