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)