Tax, land, probate and vital records:
LAND RECORDS
Land Records, 1664-1854. Index, 1664-1947. (LDS)
Jacobus, Donald Lines, Killingworth (Conn) Land Records TAG 22 (1945-46): 113-14
PROBATE RECORDS
Killingworth, Probate District, Town Office Building, Route 81 Organized 3 June 1834 from the Saybrook Probate District
From 28 May 1838 to 1 June 1842 it was known as the Clinton Probate District
ON FILE AT Conn. State Library (CSL): Estate Papers, 1834-1921, Indexes, 1834-1921.Inventory Control Book, 1834-1921. Court Record Books, 1834-1852.
Probate Records, 1834-1852. (LDS)
TAX RECORDS
Hartford. CSL, Record Group 62. Tax Lists, 1777-1785, 1831-1932.
VITAL RECORDS
Town Clerk, Town Office Building, Route 81. The Town Clerk's earliest birth and marriage records are 1665 and death record is 1669.