The Quarry Triangle neighborhood in Marion, Indiana, exhibits a low diversity demographic profile with a white majority of 85% as of 2022. This predominantly white community has maintained its racial composition over the past decade, though subtle shifts have occurred. Economically, the neighborhood has experienced significant fluctuations in median income, suggesting a dynamic local economy. The neighborhood's name likely refers to a historical limestone quarry in the area, which may have influenced its development and community character.

Throughout the 2013-2022 period, Quarry Triangle has consistently maintained a "Low Diversity" classification. The white population has remained above 75% throughout this period, ranging from 85% to 96%. The percentage of residents identifying as two or more races fluctuated, peaking at 9% in 2015 before declining to 2% in 2017-2019, then rising again to 7% by 2022. The Hispanic population, while small, has shown growth from 0-1% in earlier years to 5-6% in recent years (2020-2022). The Black population remained relatively stable at 1-3% throughout the decade. These shifts suggest a slight trend towards increased diversity, though not enough to change the neighborhood's overall classification from "Low Diversity."

The median income in Quarry Triangle has shown significant volatility. From 2013 to 2019, median income fluctuated between $48,374 and $54,401, showing relative stability. A dramatic increase occurred in 2020 and 2021, with median income reaching $67,371 and $78,497 respectively. In 2022, there was a sharp decline to $56,730, though still higher than pre-2020 levels. These economic fluctuations do not appear to directly correlate with the subtle demographic shifts. The significant income increase in 2020-2021 might be attributed to broader economic factors or changes in the local job market, rather than demographic changes.