Coal Valley in Illinois is characterized by low diversity with a predominant white population. As of 2022, the community is classified as "Low Diversity" with 92% of the population identified as white. The village has experienced modest population growth over the past decade, increasing from 4,919 in 2010 to 5,184 in 2022. The area has seen significant income growth, with the median household income rising from $82,488 in 2013 to $88,834 in 2022, indicating a relatively affluent suburban community.

Throughout the observed period, Coal Valley has consistently maintained its status as a "Low Diversity" community. The white population has seen a slight decrease from 97% in 2013 to 92% in 2022. The Hispanic population has shown the most significant growth, increasing from 2% in 2013 to 5% in 2022. Other racial groups have maintained minimal representation, with no substantial changes over the decade. These changes suggest a slow trend towards slightly increased diversity, though not enough to shift the community out of the "Low Diversity" category.

The economic trajectory of Coal Valley has been generally positive. Median household income has increased by about 7.7% from 2013 to 2022, outpacing inflation for most of this period. There was a notable increase in median income from $88,517 in 2020 to $93,935 in 2021. The population has grown by about 5.4% from 2010 to 2022, indicating a stable and slightly growing community. The increasing median income correlates with the maintained low diversity, suggesting that the area remains attractive to affluent white households while slowly becoming more accessible or appealing to Hispanic families.