Hey Gdad621
"Apps that can show your location on the screen, including Maps, show your current (approximate) location using a blue marker. In Maps, if your location can’t be determined precisely, you’ll see a blue circle around the marker." To review additional information, click here: About privacy and Location Services in iOS and iPadOS.
Another reason could be related to the address that appears when you sign into your Apple ID. For more information, scroll to the section labeled "What if I don’t recognize the location shown in my sign in notification?" in this article: Two-factor authentication for Apple I
Other factors such as third-party software that can adjust your date, time, and/or location, may be involved as well.
Here's another article that may interest you as well: Turn Location Services and GPS on or off on your iPhone, iPad, or iPod touch - Apple Support
Hope this helps. Take care.