Series 1 Farm Names Register, 1912-1949
Series 2 Podiatrist Register, 1895-1951
Series 3 Board of Elections Hotel Register, 1967-1977
Series 4 Architects Register, 1919-1951
Series 5 Statute Foreclosures Notices, 1857-1938
Series 6 Declaration of Intention Record Books, 1855-1906
Series 7 Oaths of Office, 1789-1968 (gaps)
Series 8 Works Progress Administration Survey, 1936-1940
Series 9 Court of Common Pleas Minutes, 1710-1846
Series 10 Internal Archives Collection
Series 11 Naturalization Petitions, 1895-1991
Series 12 Unassigned
Series 13 Naturalization Record Books, 1844-1906
Series 14 Naturalization Petitions, Rejected, 1898-1906
Series 15 Naturalization Records, Miscellaneous, 1808-1924
Series 16 Estate Records, 1775, 1782-1921
Series 17 New York City Indexes to Deeds, Releases, Mortgages, and Assignment of Mortgages, 1898-1921
Series 18 Unassigned
Series 19 Census Rolls (New York State), 1905, 1915, 1925
Series 20 Miscellaneous Historic Records Collection, 1918, 1932, 1983
Series 21 Hugh R. Pomeroy Collection, 1926-1966
Series 22 Planning Board Minutes, 1939-1983
Series 23 Interstate 684 Records, 1960-1967
Series 24 Courthouse Development Committee Records, 1915, 1948-1968
Series 25 Edwin G. Michaelian Collection: Pre-County Executive Records, 1895-1969 (bulk 1943-1957)
Series 26 Edwin G. Michaelian Collection: County Executive Records, 1958-1984 (bulk 1958-1973)
Series 27 Edwin G. Michaelian Collection: Post-County Executive Papers, 1974-1984
Series 28 Unassigned
Series 29 Edwin G. Michaelian Collection: Memorabilia and Certificates, c. 1896-1983
Series 30 Edwin G. Michaelian Collection: Audiovisual Materials, c.1980-1982
Series 31 Edwin G. Michaelian Collection: Scrapbooks and Clippings, 1939, 1949, 1951-1983
Series 32 Election Notices, 1892-1895
Series 33 Declarations of Intention, 1906-1980
Series 34 Deeds Index, Grantor, 1680-1931
Series 35 Commissioners of Forfeiture Proceedings, 1784-1786
Series 36 Foreign Notaries, 1884-1944
Series 37 Homestead Exemptions, 1850-1978
Series 38 Dentists Register and Affidavits, 1941-1950
Series 39 Dental Hygienists Affidavits, 1947-1950
Series 40 Osteopaths Register and Affidavits, 1904-1943
Series 41 Horseshoers Register, 1899-1904
Series 42 Oaths of Office Index, c.1845-1886
Series 43 Court of Sessions Minutes, 1684-1895
Series 44 Westchester County Tricentennial Committee Records, 1980-1983
Series 45 Incorporation Records, 1875, 1881-1926
Series 46 Assumed Business Names Index, 1900-1933
Series 47 Deeds, 1684-1930
Series 48 Bicentennial Commission of Westchester County Records, 1950, 1973-1981 (bulk 1974-1976)
Series 49 Board of Elections Bills and Expenses, 1912-1956
Series 50 Parks Department Historic Facts File, ca. 1850-1990 (bulk 1920s-1930s)