Delaware Map of Hundreds,1875 to present. From: Delaware Place Names, U.S. Geological Survey Bulletin, p. 5.
The use of hundreds in America dates back to colonial days. Hundreds were used as a sub-county division in England and were introduced in some of the British colonies. For Delaware, the origin is cited as a letter written in 1682 by William Penn, the newly- appointed Lord Proprietor of the province of Pennsylvania and the counties on the Delaware. Penn directed that from this point onward, settlements be divided into sections of 100 families. The first use of the term Hundred in official records relating to the Delaware colony dates to 1687, when reference is made to "a list of taxables of north side of Duck Creek Hundred." (from the New Castle County court records, Returns of the Constables, as cited in Scharf, p. 611f).
Delaware Genealogical Research Guide, p. 5:
On 25 Oct 1682, William Penn directed that Delaware be divided into townships occupied by 100 families where each family would have an average of about ten members (including servants). These townships were referred to as "hundreds" in a 9 Apr 1690 order by the Provincial Council. Originally, there were five hundreds in New Castle County, five in Kent County and two in Sussex County. As the population grew, several of the hundreds divided, creating new hundreds. In 1875, the total number of hundreds had grown to the present-day thirty-three hundreds. Their boundaries have essentially not changed since and no longer serve as judicial or legislative districts.
Munroe, History of Delaware, p. 49:
A hundred is an old English subdivision of a county, its origin shrouded in mystery.... The name was used in many colonies but survived in America only in Delaware, probably because there the counties were all established so early – by 1680 – that little reorganization was needed. In New England, the newer English term, town, replaced hundred, and in Pennsylvania and New Jersey the term township was adopted.
Scharf, History of Delaware, quotation from a letter by William Penn to the justices of the peace in Sussex county (25th of Tenth Month, 1682), p. 611 note:
That you endeavor to seat the land that shall hereafter be taken up in the way of townships. As three thousand acres amongst Tenn familys; if single persons one thousand acres. Amongst Tenn of them laid out in the nature of a long square five or Tenn of a side, and a way of two hundred foot broad left between them for an Highway in the Township, and I would have you careful for the future good and grate benefit of your country.
On page 84, Scharf uses the terms "three lower counties" and "Delaware Hundreds" interchangeably.
Delaware 1782 Tax Assessment and Census Lists, p. 2:
A "hundred" is an old Saxon land division which is smaller than a county or shire and larger than a tithing. It comprised ten tithings of ten freeholder families each, or 100 families.
Conrad, History of the state of Delaware, Volume 2, p. 449:
The term "hundred" is of early English origin, dating from the time of King Alfred the Great, and was first used as the sub-division of a county, in Pennsylvania, of which Delaware was then a part. In 1682 William Penn uses the word "hundred" in a letter to the justices of the peace of Sussex county. Its use was discontinued among the various States after the Revolution, Delaware being the only one to retain the term in its ancient meaning.
B.A., History. University of North Carolina, Chapel Hill. 1973.
M.S., Library Science. University of North Carolina, Chapel Hill. 1981.