Zip code 16851 in Lemont, Pennsylvania, is classified as a "Low Diversity" area with a "White Majority" as of 2022. The community has a population of 314 and a median income of $73,844. From 2013 to 2022, Lemont maintained its status as a "Low Diversity" area with a "White Majority." The white population remained above 89% throughout this period, with minor fluctuations. The Hispanic population increased from no recorded data in 2013 to 5% in 2022. The population identifying as two or more races generally increased from 1% in 2013 to 2% in 2022, with a peak of 5% in 2021. The white population decreased slightly from 96% in 2013 to 92% in 2022.

The median income in Lemont fluctuated significantly over the past decade. It increased from $79,254 in 2013 to a peak of $98,009 in 2016. Since 2016, there has been a downward trend in median income, reaching $73,844 in 2022, below the 2013 level. The population decreased from 415 in 2013 to 314 in 2022. The increase in diversity coincided with a decrease in both population and median income.

The demographic and economic trends in Lemont align with patterns seen in many rural and small-town American communities, which often face challenges of population decline and economic stagnation. The gradual increase in diversity, particularly in the Hispanic population, reflects a national trend of increasing diversity in previously homogeneous communities, albeit at a slower pace in this case. The significant fluctuations in median income over a relatively short period may indicate a local economy sensitive to specific industries or employers.