The ZIP code 16868 in Pine Grove Mills, Pennsylvania has experienced population and population density fluctuations from 2010 to 2022. The population ranged from 22 in 2016 to 42 in 2020, with the 2022 data showing a population of 41 and a density of 227.78 people per square mile.

Given the ZIP code's size of 0.18 square miles and the 2022 population density, the area is classified as rural. Rural areas typically have population densities between 50 and 500 people per square mile, which aligns with the data for this ZIP code. Rural lifestyles are generally community-oriented, with larger living spaces of 1 to 5 acres, fewer public services, and lower infrastructure density compared to urban areas.

The estimated number of housing units corresponding to the 2022 population, based on the national average household size of 2.61, is approximately 15.71. This suggests that the area likely has a small number of households with larger lot sizes, consistent with the rural classification.