It is 156.9 acres (63.5 ha) in area and includes 478 contributing buildings.

Marshall ("M Street") within the Alphabet District but not further,[5] was added to the National Register of Historic Places.

[6] The district includes about 50 buildings which are separately listed on the National Register.

These include: It also includes at least eight Portland Historic Landmarks: It includes or has other association with Portland West End Historic District and Portland Nob Hill Historic District.

Historic function: Domestic; Social; Religion; Commerce/trade Historic subfunction: Single Dwelling; Multiple Dwelling; Civic; Religious Structure; Business Criteria: event, person, architecture/engineering