Baltimore County maintains extensive on-line information at their web site at: BaltimoreCountyMD.gov. However, they have a nasty habit of removing important information after a year or two, as if no one is still interested. I have been downloading much of this information since 2009, so have an almost complete collection. It is being posted here, linked under the various agencies, and on another page for Boards and Commissions.
Updated 7 Feb 2019 by MAP