Background: Scrub typhus (ST) is a life-threatening, neglected tropical disease endemic to the Asia-Pacific region, transmitted by the larval stage of trombiculid mites (chiggers). Surveillance methods vary widely and often focus on feeding stages; however, commonly used metrics such as the chigger index may not accurately represent human exposure risk. This scoping review protocol outlines two complementary reviews based on a single, comprehensive literature search, aiming to support improved surveillance strategies and strengthen epidemiological modelling of ST risk. Methods Through the Population, Concept, Context (PCC) framework, the reviews will address surveillance approaches (Concept) for trombiculid mite populations (Population) to inform ST risk modelling (Context). The first review will identify and evaluate methodologies used to survey trombiculid mite populations, focusing on their application in understanding population dynamics and informing risk models. It will also examine how these methods have evolved across time and regions, highlight current surveillance gaps, and suggest ways to improve methodological approaches for better ST risk assessment. The second review will synthesise and, where feasible, pool findings from the included studies on seasonal patterns of mite abundance (both questing and feeding stages), host availability, and infection rates in vectors and hosts across diverse geographical settings. The protocol follows the JBI methodology. Studies reporting quantitative data on mite abundance from natural habitats, including any life stage, will be eligible. Data extraction and synthesis will follow standardised JBI procedures.