People with disabilities are often subject to intersecting layers of social and economic disadvantage and other barriers that drive health inequity. As a result, they frequently experience worse health than people without disabilities, beyond the direct effects of their health condition or impairment. The aim of this overview of systematic reviews was to summarise the evidence on the impact of socio‐environmental factors (i.e. social, physical or attitudinal) on the health outcomes of disabled people. A systematic search of five databases (MEDLINE, PsycINFO, Embase, CINAHL and Scopus) for English‐language articles from January 2000 to April 2021 was conducted. Abstracts were screened by two reviewers and reviews were critically appraised. Key data were extracted by topic, population, disability type, critical appraisal method, socio‐environmental themes and health outcomes. There were 23 systematic reviews identified examining adult (60.9%) or child and young (8.7%) disabled people, with 30.4% not specifying an age range. Reviews examined people with neurological or physical (39.1%), intellectual (17.4%), sensory (8.7%) or a range of (34.8%) disabilities. Three key health outcomes (i.e. access to healthcare, health‐promoting behaviour and care quality) and several recurring socio‐environmental themes related to the health outcomes of disabled people were identified. Disabled people encounter common social, physical and attitudinal factors that hinder their health outcomes in terms of access to services and quality healthcare. Many preventive health services were identified as either inaccessible or not meeting the needs of disabled people. Greater involvement of disabled people in service design and awareness raising is essential.