- 1 Alpine (Alps)
- 3 Alps
- 1 Alta Friendly Society
- 2 Altarpieces
- 30 Altars
- 1 Alter Street
- 1 Alter, George E., 1868-1940
- 2 Alterations (object components)
- 2 Althoff, Bergmann & Co.
- 1 Alton, Illinois
- 5 Alum
- 1 Am?r Kab?r, M?rz? Taq? Kh?n, -1852
- 1 Amalekites
- 1 Aman Steam Planing Mill
- 53 Amateur theater
- 1 Amateurs
- 1 Amazon Vase
- 2 Amber
- 1 Amber Carpet Mill
- 2 Amber Dye Works (Thomas Dawson & Co.)
- 1 Amber Hall
- 2 Amber Street
- 2 Ambler, Pennsylvania
- 10 Ambleside, England
- 5 Ambrose, Saint, Bishop of Milan, d. 397
- 1 Ambulances
- 3 America (Sculpture)
- 3 American Academy of Music see Academy of Music
- 3 American Agricultural Co., Tygert-Allen Fertilizer Works
- 1 American Bank Note Co.
- 1 American Book Trade Association
- 1 American Bridge Company
- 1 American Buttonhole, Overseaming & Sewing Machine Co.
- 5 American Catholic Historical Society
- 1 American Catholic Quarterly Review, The
- 1 American Cereal Co.
- 1 American Civil War
- 3 American Clothing Co.
- 1 American Dairymen's Association Building
- 4 American District Telegraph Co.
