Auction sale notices run three consecutive weeks prior to a foreclosure.
Below is each county's publication of record:

Allegany County, MDThe Cumberland Times-News
Anne Arundel County, MDThe Capital
Baltimore City, MDThe Daily Record
Baltimore County, MDThe Jeffersonian
Calvert County, MDThe Calvert Recorder
Caroline County, MDThe Times-Record
The Star  Democrat
Carroll County, MDThe Carroll County Times
Cecil County, MDThe Cecil Whig
Charles County, MDThe Maryland Independent
Dorchester County, MDThe Daily Banner
Frederick County,MDThe Frederick News-Post
Garrett County, MDThe Republican
Harford County, MDThe Aegis
Howard County, MDThe Howard County Times
Kent County, MDKent County News
Montgomery County, MDThe Sentinel
Prince George's County, MDThe Enquirer-Gazette
The PG Post
The Washington Times
Queen Anne's County, MDThe Queen Anne's Record-Observer
Somerset County, MDThe Somerset Herald
St. Mary's County, MDThe Enterprise
Talbot County, MDThe Star-Democrat
Washington County, MDThe Herald-Mail
Wicomico County, MDThe Daily Times
Worcester County, MDThe Daily Times
Washington, DCThe Washington Times