City directories were created as an aid to salesmen and businessmen in contacting residents of a given city or area. Almost all large cities in the U.S. had city directories for at least a period of time. These usually contain a business section with all the businesses in the area listed in alphabetical order.
Most important to family researchers are the names of all residents in alphabetical order by surname. If the person was married, his wife was usually listed; also included were his occupation and/or place of employment and the street name and number at which he lived.
Another feature was the alphabetical listing of all streets, avenues, roads, etc., in the city. In this section all households were listed in the order of the street
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