This report documents information concerning the money income of persons 14 years and older in the United States during 1975. "Money income" is defined as income received before tax and other deductions. The report does not include sources of non-money income such as food stamps, health benefits, and subsidized housing. The questionnaire used in the 1975 survey was modified from the 1974 version to include changes in the definitions of population control and metropolitan residences, in the collection of income and work experience data, and in question wording and procedure. Questions included in the survey characterize both families and persons according to family type, number of earners within the family, education level, age, work experience, housing tenure, sex, source, and type of income. In total, 11 income questions were asked, two more than in 1974. Questions were read aloud and an extension of the interview period and follow-up forms provided the respondent with time to gather more income information. Highlights note the overall trends and statistics which indicate the state of the economy in 1975. Definitions, explanations of terms, and changes in the questionnaire are listed in appendices. A facsimile reproduction of the four page questionnaire is included. The data was processed through a new system with expanded capabilities. The bulk of the report consists of detailed tables. (KC)