This statistical profile provides current demographic data for Washington State and its counties, incorporated cities and towns. Seventeen tables show population by age and sex; population for counties, incorporated cities and towns, and the state; components of population change; a rank order of total persons in incorporated cities and towns; total persons in incorporated cities and towns by alphabetical order; housing units by structure type; annexations, incorporations, and municipal boundary changes; change in population, housing units, and land area; growth of households; adjusted estimates of the population 65 years and older; population estimates by Bureau of Census racial categories and for Spanish origin; institutional residents; armed forces personnel; components of change for the state; general fertility rate; marriages and divorces; and state and county population estimates and forecasts. The state population has increased from 4,132,156 in 1980 to 4,565,000 in 1988. Sixty-six percent of the growth since 1980 resulted from natural increase, or more births than deaths. About 33% of the increase in state residents, 144,000 persons, can be attributed to net migration. The total incorporated area has increased by 118 square miles in the past 8 years bringing the current incorporated land area to more than 1,115 square miles. The number of Washington households in 1988 (1,787,836) reflects a growth rate of 2.0% as compared to the population growth rate of 1.3% since 1980. Migration plays a major role in state growth as does the increase in nonmanufacturing jobs. Employment growth in the state is expected to be slower but more stable. (ALL)