Baldwin is an

unincorporated community An unincorporated area is a parcel of land that is not governed by a local general-purpose municipal corporation. (At p. 178.) They may be governed or serviced by an encompassing unit (such as a county) or another branch of the state (such as th ...

Baltimore County Baltimore County ( , locally: or ) is the third-most populous county in the U.S. state of Maryland. The county is part of the Central Maryland region of the state. Baltimore County partly surrounds but does not include the independent city ...

Maryland Maryland ( ) is a U.S. state, state in the Mid-Atlantic (United States), Mid-Atlantic region of the United States. It borders the states of Virginia to its south, West Virginia to its west, Pennsylvania to its north, and Delaware to its east ...

, United States. The

USPS The United States Postal Service (USPS), also known as the Post Office, U.S. Mail, or simply the Postal Service, is an independent agency of the executive branch of the United States federal government responsible for providing postal serv ...

has assigned Baldwin the ZIP Code 21013.Zip Code Lookup
/ref> Until 1958, this community was served by the

Maryland and Pennsylvania Railroad The Maryland and Pennsylvania Railroad , colloquially known as the "Ma and Pa", was an American short-line railroad between York, Pennsylvania, York and Hanover, Pennsylvania, formerly operating passenger and freight trains on its original line be ...

at milepost 18.4. Hidden Valley Farm was listed on the

National Register of Historic Places The National Register of Historic Places (NRHP) is the Federal government of the United States, United States federal government's official United States National Register of Historic Places listings, list of sites, buildings, structures, Hist ...

in 1983.

References

Unincorporated communities in Baltimore County, Maryland Unincorporated communities in Maryland {{BaltimoreCountyMD-geo-stub