Mount Joy in Pennsylvania possesses a LIHTC funded affordable housing inventory of 92 units, all designated as low-income. This accounts for approximately 2.9% of the city's estimated total housing stock of 3,170 units. The borough has received $388,708 in project tax credits from the LIHTC program for affordable housing. With two approximate projects, this equates to an average federal funding of $194,354 per project and $4,225 per unit. Mount Joy holds 0.07% of the total state LIHTC funding.

The affordable housing presence in Mount Joy spans from 1991 to 1996, with two notable projects: Sassafras Terrace Apartments (completed in 1991) and Nissley Chocolate Factory (completed in 1996). The 1990s saw the most affordable housing development in the city. The LIHTC funded housing inventory consists of 4 efficiencies, 16 one-bedroom units, 49 two-bedroom units, 13 three-bedroom units, and 1 four-bedroom unit. This mix of unit types suggests an effort to accommodate various household sizes and needs within the affordable housing stock.

Mount Joy has experienced steady population growth over the last decade, increasing from 7,643 in 2013 to 8,274 in 2022. The median income has also shown an overall upward trend, rising from $65,715 in 2013 to $73,455 in 2022, with some fluctuations in between. Racial demographics have remained relatively stable, with the white population consistently representing the majority (around 81-85%). However, there has been a notable increase in the Hispanic population, growing from 6% in 2013 to 13% in 2022. This demographic shift might indicate a changing need for affordable housing options in the future.