Over the past decade, the population in zip code 17584 has exhibited steady growth, increasing from 7,300 in 2013 to 9,291 in 2022. This represents a population increase of 27% over this period. Concurrently, the median income has risen from $71,578 in 2013 to $81,903 in 2022, indicating an overall improvement in economic conditions.

The racial composition of the area has remained predominantly white, though there has been a slight decrease in the white population percentage from 98% in 2013 to 87% in 2022. There has been a modest increase in racial diversity, with the Hispanic population growing from 1% in 2013 to 7% in 2022, and small increases in other racial groups.

The completion of the Willow Run project in 2015 aligns with the period of population growth and increasing median income, suggesting a response to the growing housing needs of the community.

Zip code 17584 in Willow Street, Pennsylvania, has a single LIHTC-funded affordable housing project, Willow Run, completed in 2015. This project provides 72 units, with 61 designated as low-income units, representing about 2% of the estimated housing inventory. The area has experienced significant population growth and rising median incomes over the past decade, along with a slight increase in racial diversity. The LIHTC investment of over $1.3 million demonstrates a commitment to providing affordable housing options in this growing community.