I noticed on google maps there's a red outline of city limits.
Is there any way to get a KML file of the city limits?
Update fixed stale link
US Cities for 2019 and later can be found here
https://www.census.gov/geographies/mapping-files/time-series/geo/cartographic-boundary.html
I was incidentally looking for the same thing. Census link was the number one result, this article was 4th on the list. Saw it had no answer.
Hope this helps