Iowa endured high outmigration rates among young adults during the 2000 to 2010 period. In light of accelerating exits from the labor force as the "baby boom" generation reaches retirement age and Iowa's somewhat smaller labor force ages 25 through 44 than the national average, the state's labor force is projected to contract. This report uses age and sex specific mortality and migration rates from the 2000 to 2010 period to project Iowa's working age population by 2020. Overall, the projections indicate an expected contraction in the Iowa population ages 16 to 64 of 74,142 persons. If that is the case, Iowa's economy may have trouble expanding.