Zip code 78663 in Round Mountain, Texas, is classified as having Low Diversity as of 2022. The population is predominantly White (85%) with a median income of $107,224. The community has a population of 1,192 in 2022 and has experienced minor demographic changes and significant economic growth over the past decade.

From 2013 to 2022, Round Mountain has maintained a Low Diversity classification, with the White population remaining the majority. The White population decreased slightly from 93% in 2013 to 85% in 2022. The Hispanic population fluctuated between 3-8% over the years. The Asian population increased from 0% in 2013 to 3% in 2022. The Pacific Islander population emerged as a new demographic, growing from 0% to 3% between 2013 and 2022. The proportion of residents identifying as two or more races increased from 0% to 2%.

The economic trajectory of Round Mountain has been positive. The median income increased from $76,986 in 2013 to $107,224 in 2022, representing a 39% growth over nine years. The population increased from 951 in 2013 to 1,192 in 2022, a 25% increase. The correlation between demographic shifts and economic trends suggests that the increasing diversity may be linked to the area's economic growth.