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<br />Standard motropolitBn statistical &reaS.- The Bureeu of the
<br />Census recognizes IIpproximately 250 standard
<br />metropoliten steti.tical .ress (SMSA'.)in the 1970 censu.,
<br />These include the 23\ SMSA', (including three in. Puerto
<br />Rico) lIS defined and named in the Bureau of the Budget
<br />pubHcation, StanJBtd Metropolitan Statistical Areas:
<br />7967, U,S. Government Printing Office. Washington, D.C.
<br />20402, AI.o included are two SMSA'. a. defined bv the
<br />Bureau of the Budget in January 196& In addition, a
<br />number of SMSA's are being defined on the basis of the
<br />results from the 1970 census.
<br />
<br />Except in the New England States, a standard
<br />metropolitan statistical area is a county or group of
<br />contiguous counties which contains at least one city of
<br />50.000 inhabitants or more, or "twin cities" with a
<br />combined population of at least 50,000. I n addition to the
<br />county, or counties. containing such a city or cities,
<br />contigJous counties are included in an SMSA if, according
<br />to certain criteria, they are socially and economically
<br />integrated with the central city. I n a few cities 'Nhere
<br />portions of counties outside the SMSA as defined in 1967
<br />were annexed to the central city, the population living in
<br />those counties is not considered part of the central city. In
<br />the New England States, SMSA's consist of towns and
<br />cities instead of counties. For a complete description of
<br />the criteria used in defining SMSA's, see the Bureau of the
<br />Budget publication cited above.
<br />
<br />.,
<br />
<br />Places.- Two types of places are recognized in the census
<br />reports, incorporated places and unincorporated places.
<br />Incorporated places are political units incorporated as
<br />cities, boroughs, towns, and villages except for (al
<br />boroughs in Alaska and (b) towns in the New England
<br />States, New York, and Wisconsin. Unincorporated places
<br />are closely settled population centers without corporate
<br />limits for which the Census Bureau has delineated
<br />boundaries. Each place so delineated possesses a definite
<br />nucleus of residences and has its boundaries drawn to
<br />include, if feasible, all the surrounding closely settled area.
<br />Unincorporated places are identified with the letter "U."
<br />
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<br />
<br />Towns.-In this series of reports, data for towns of 10,000
<br />inhabitants or more are shown in the reports for the New
<br />England States. I n these States, towns are the primary
<br />political subdivision of the county, unlike most other
<br />States where towns are generally incorporated places.
<br />
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<br />
<br />Race.- The concept of race as used by the Census Bureau
<br />does not denote clear-cut scientific definitions of
<br />biological stock. Rather it reflects self-identification by
<br />respondents. Since the 1970 census obtained the
<br />information on race principally through self-enumeration,
<br />the data represent essentially self-classification by people
<br />according to the race with which they identify themselves.
<br />For persons of mixed parentage who are in doubt as to
<br />their classification, the race of the person's father is used.
<br />Persons of Mex ican or Puerto Rican birth or ancestry who
<br />do not identify themselves as of a race other than white
<br />(e.g., American Indian, Negro, etc.), are classified as white.
<br />In the 3.category grouping shown in this report, the
<br />"other" category consists of all races except 'Nhite or
<br />Negro, i.e., American I ndian, Japanese, Chinese, Filipino,
<br />Korean, Eskimo, etc.
<br />
<br />Age.- The age classification is based on the age of the
<br />person in completed years as of April 1, 1970,
<br />
<br />Hou..holds and. woup quartBn.-AII penon. ere cl.ssified
<br />as living in either a household or group quarters.
<br />
<br />A household consists of all the persons who occupy a
<br />housing unit. A house, an apartment, a group of rooms, or
<br />a single room is regarded as a housing unit when it is
<br />occupied or intended for occupancy as separate living
<br />quarters. Separate living quarters are those in which the
<br />occupants do not live and eat with any other persons in
<br />the structure and which quarters have either (1) direct
<br />access from the outside of the building or through a
<br />common hall or (2) complete kitchen facilities for the
<br />exclusive use of the occupants. A household may.
<br />therefore, consist of a single family, one person living
<br />arone, two or more families living together, or any other
<br />group of related or nonrelated persons 'Nho share living
<br />arrangements (except as described in the next paragraph
<br />on group quarters).
<br />
<br />Group quarters are living arrangements for institutional
<br />inmates or for other groups containing five or more
<br />persons not related to the person in charge. Group quarters
<br />are located most frequently in institutions, boarding
<br />houses, military barracks, COllege dormitories, fraternity
<br />and sorority houses, hospitals, monasteries, convents, and
<br />ships. A house or apartment is considered group quarters if
<br />it is shared by the person in charge and five or more
<br />persons unrelated to him, or if there is no person in charge,
<br />by six or more unrelated persons.
<br />
<br />Persons in group quarters are subdivided here i?no "inmate
<br />of institution" and "other." The former are persons for
<br />whom care or custody is provided in such places as homes
<br />and schools for the mentally or physically handicapped,
<br />places providing long-term medical care for persons with
<br />mental disorders or chronic diseases, homes for dependent
<br />children, prisons, etc. Staff members living in group
<br />quarters in such places, as well as persons in all the other
<br />types of group quarters, are classified as "other."
<br />
<br />Relationship to head of household.-One person in each
<br />household is designated as the "head, "that is, the person
<br />who is regarded as the head by the members of the
<br />household. Two types of head of household are recognized
<br />here-the head of a family and a primary individual. A
<br />family head is a person living with one or more relatives
<br />(persons related to him by blood, marriage, or adoptionl.
<br />A primary individual is a household head living alone or
<br />with nonrelatives only.
<br />
<br />I n this report, all household members other than the head
<br />are shown in one of the following three categories: (1)
<br />"wife of head"-a woman married (either by formal or
<br />common law marriage) to the household head; (2) "other
<br />relative of head" -all persons related to the head by blood,
<br />marriage, or adoption (exclUding wife of head); or (3) "not
<br />related to head" -all persons not related to the head by
<br />blood, marriage, or adoption.
<br />
<br />Symbols.-A dash "-" represents zero. The symbol "U"
<br />means that the place is unincorporated. Three dots "..."
<br />indicate that the data are being withheld to avoid dis-
<br />closure of information for individuals.
<br />
<br />For sale by th~ Bur~au of th~ Census, Washingron D.C. 20233. Bfld U.s. Department of Commerce Field Offices, 30 cents.
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