Bastardy Proceedings, 1778-1846 (Series 217)
Bicentennial Commission of Westchester County Records, 1950, 1973-1981 (bulk 1974-1976) (Series 48)
Births, Marriages, and Deaths (returns of), 1842, 1847-1848 (bulk 1847) (Series 272)
Blind Brook Construction Records, 1980 (Series 68)
Blue Mountain Reservation -- Reports and Photographs, 1933-1936 (Series 277)
Board of Acquisition and Contract Calendars, 1978-1980, 1982-1986 (Series 378)
Board of Acquisition and Contract Minutes, 1939-1978, 1980-1989 (Series 83)
Board of Elections
Annual Reports, 1936-1939, 1954-1986 (gaps) (Series 144)
Bills and Expenses, 1912-1956 (Series 49)
Canvassers Records, 1822-1833 (Series 75)
Correspondence, 1940-1968 (Series 85)
Elections and Canvasses Records, 1892-1921, 1936-1998 (gaps)
(Series 140)
Election and Canvass Records, 1826 (Series 265)
Election Notices, 1892-1895 (Series 32)
Elections Petitions and Certificates Filed, 1940-1970 (Series 142)
Hotel Register, 1967-1977 (Series 3)
Hotel Reports, 1947-1972 (Series 203)
Minutes, 1911-1927, 1935-1950 (Series 141)
Board of Legislators
Board Meeting Packets, 1970-2000 (Series 308)
Budget and Appropriations Committee Meeting Minutes, 1926, November
1928-1971, 1974-1976 (Series 339)
Daniel P. Thomas Files, 1986-1995 (Series 399)
Local Laws, 1960-1984 (Series 360)
Meeting Videos, 1990-present (Series 213)
News Clippings and Press Releases, 1983-2006 (bulk 1990-1998, 2001-2005)
(Series 340)
Proceedings, 1970-1988, 1990-2007 (Series 147)
Subject Files, 1890-1980 (bulk 1928-1969) (Series 300)
Board of Supervisors
Board Meeting Packets, 1925-1929 (gaps); 1930-1969 (Series 299)
Budget and Appropriations Committee Meeting Minutes, 1926, November
1928-1971, 1974-1976 (Series 339)
Charter Revision Committee, 1922-1984 (bulk 1951-1969) (Series 388)
Commission on Government Records, 1926-1937 (bulk 1936-1937)
(Series 302)
Local Laws, 1960-1984 (Series 360)
Minutes, 1772-1930 (Series 215)
Proceedings, 1772-1969 (Series 145)
Records, 1853-1913 (Series 216)
Subject Files, 1890-1980 (bulk 1928-1969) (Series 300)
Bronx Parkway Commission
Annual Reports, 1907-1925 (gaps) (Series 95)
Land Acquisitions, c.1906-1933 (Series 109)
Minutes, 1907-1925 (Series 118)
Photographs, 1912-1924
Bronx Parkway Commission, Appraisal Commissioners
Appeals, 1916-1924 (Series 104)
Minutes, 1916-1924, 1928-1930 (Series 103)
Bronx River Parkway Plans, 1915-1920 (Series 255)
Bronx River Parkway Records, Parks Department, 1924-1977, 1980-2003 (bulk late 1920s-early 1970s) (Series 387)
Bronx River Parkway Reservation, Historic American Engineering Record, 2001-2002 (Series 254)
Bronx Valley Sewer Commission
Final Report, 1896 (Series 94)
Records, 1907-1916, 1939 (Series 166)
Budgets, 1930-1991 (Series 110)