Data from the 1985 Intercensal Survey of Indonesia is used to assess the effectiveness of health interventions and related programs implemented in the early 1970's in Indonesia. The data from the 2nd Intercensal Survey, SUPAS, in 1985 suggest a major decline in child and infant mortality rates, since 1980. The Trussell indirect method gives an estimate of 72/1000 for all Indonesia, some 33% lower than the 1980 indirect estimate. The last birth' method gives an estimate of 72.2/1000 for 1985. The pattern of change in provincial infant mortality rates also depends greatly on which method of estimation is used. The Trussell method produces a range of provincial annual % declines over the 5 year period of 5% in West Nusatenggara to 22.2% in Irian Jaya. Provincial child mortality rates using the West Model Coale and Demeny Tables and the United Nations General Model Tables are given. The average child and infant mortality rate for all Indonesia was about 30/1000 children aged 1 year, in late 1981. The infant and child mortality probabilities suggest that the age pattern of mortality at young age may be changing with greater impact on child survival being experienced by infants rather than children. In conclusion, the data indicate that infant mortality has been halved before the end of this 4th, 5-year Development Plan, which ends in March, 1989, can be reasonable hoped for.