Lynn is a neighborhood of Oakland.

Although there are claims that Lynn is also known as Highland Park, according to Greenstreets, Highland Park is a separate neighborhood.  If there is evidence to the contrary, please cite the sources.

I don't know the boundaries besides my map / Greenstreets offhand, but Lynn (named after Lynn, MA, because of shoe factories) was a separate town that Brooklyn annexed. It may be possible to find a historical map of Lynn to see if it included Highland Park or what.