This tool gives you a popup, and an automatic way to email all your elected officials:
http://mgaleg.maryland.gov/webmga/frmmain.aspx?pid=legisrpage&tab=subject6&poptype=find&popid=
Excellent!
And if you are not sure who your elected officials are or what district you are in, as long as you are registered, this link will show you:
https://voterservices.elections.maryland.gov/votersearch