Index: Papers of John Adams, Volume 20, A
- AA
- AA2
- Abyssinia (now Ethiopia)
- Académie royale des sciences (Paris)
- Adams, Abigail, 2d (Nabby, 1765–1813, daughter of AA and JA, wife of WSS, designated as AA2 in The Adams Papers)
- Adams, Abigail Smith (1744–1818, wife of JA, designated as AA in The Adams Papers)
- Adams, Charles (1770–1800, son of AA and JA, designated as CA in The Adams Papers)
- Adams, Charles Francis (1807–1886, son of JQA and LCA, designated as CFA in The Adams Papers)
- Adams, Elizabeth Welles (wife of Samuel)
- Adams, Hannah (1755–1831)
- Adams, Henry (ca. 1583–1646, ancestor of JA)
- Adams, Deacon John (1691–1761, father of JA)
- Adams, Rev. John (1705–1740, poet)
- Adams, John (1735–1826, designated as JA in The Adams Papers)
- Adams, John Quincy (1767–1848, son of AA and JA, designated as JQA in The Adams Papers)
- Adams, Joseph (1626–1694, great-grandfather of JA)
- Adams, Joseph (1654–1737, grandfather of JA)
- Adams, Samuel, Sr. (1689–1748, father of Samuel)
- Adams, Samuel (1722–1803, lt. gov. of Mass., 2d cousin of JA)
- Adams, Susanna Boylston
- Adams, Thomas (father of Hannah)
- Adams, Thomas Boylston (1772–1832, son of AA and JA, designated as TBA in The Adams Papers)
- Adams National Historical Park
- Adams Papers
- Addington, Henry, 1st Viscount Sidmouth (Brit. politician)
- Addison, Joseph
- Admiralty (Brit.)
- Admiralty (Dutch)
- Aesop
- Africa
- African Americans
- African Association (Brit.)
- Agriculture
- Aitken, Robert (Phila. printer)
- Alabama
- Alamanni, Luigi di Piero (Florentine poet)
- Alamanni, Luigi di Tommaso (Florentine nobleman)
- Albany, N.Y.
- Albizzi family
- Alden, Roger (of Conn.)
- Alembert, Jean le Rond d’ (French writer)
- Alexander the Great
- Alexandria, Va.
- Algiers
- Alicante, Spain
- Allen, Jeremiah (Boston merchant)
- Allen, Luther (Conn. printer)
- Alliance (Continental frigate)
- Almodóvar, Pedro de Luxan y Silva, Marquis de (Spanish diplomat)
- Almon, John (Brit. printer)
- Altheer, Johannes (Dutch bookseller)
- Amelia Peabody Charitable Fund
- American Academy of Arts and Sciences
- American Philosophical Society
- American Revolution
- Amersfoort, Netherlands
- Ames, Fisher (Mass. representative)
- Amicus (pseudonym)
- Amsterdam, Netherlands
- Anacostia River
- Andreani, Count Paolo (of Milan, Italy)
- Anglo-American Definitive Peace Treaty
- Annan, Rev. Robert (Presbyterian minister)
- Annapolis, Md.
- Annibale, Stiépan (“Count Zanovich,” of Albania)
- Ansbach, Margraviate of
- Antifederalists
- Antoninus Pius (Roman emperor)
- Appalachian Mountains
- Appleton, Nathaniel (Boston merchant)
- Architecture
- Aristides (Greek statesman)
- Aristogiton (Athenian nobleman)
- Aristotle
- Arnold, Benedict
- Arnoux, Abbé (French cleric)
- Art
- Articles of Confederation
- Artists
- Artois, Charles Philippe, Comte d’ (later Charles X)
- Ashanti Empire (now Ghana)
- Asia
- Athens, Greece
- Atlantic Ocean
- Attorney General, U.S.
- Augusta, Ga.
- Austin, Benjamin, Jr. (Honestus, 1752–1820, Boston merchant)
- Austin family
- Austria
- Austrian Netherlands