The United States may well be on the threshold of zero population growth. In the aftermath of the post World War II baby boom, birthrates in the past 15 years have sharply declined, causing demographers to suggest that national population may stabilize in 70 years. Because of its historically lower birth-rates, and an expected decline in net in-migration, the New York Urban Region could witness the arrival of population. stability even sooner. Regional Plan Association has projected that the combined population of New York City and its 26 surrounding counties could stabilize by 2020 at a population level of 27 million if birthrates remain at the present level. Stability would set in even sooner should birthrates continue declining. However, a state of zero growth by 2020 would still mean the addition of seven million persons over 50 years. Most of this increment - about five million persons- would occur during the remaining 30 years of this century. Accordingly, this report seeks to examine the implications of such growth for the Region’s 31 counties. The pattern of population settlement and the allocation of growth to individual counties are discussed first. This is followed with a portrayal of the likely effects of such growth on housing supply and demand. And finally, the report links the impact of the expected demographic growth on the Region’s economy to changes in the geographical pattern of employment, followed by an illustrative projection of county income.