This study focuses on developing and validating a questionnaire to assess the integration of ICT by EFL teachers in higher education settings in Vietnam. Twenty EFL teachers from three language institutes participated in semi-structured interviews, generating 20 questionnaire items. Qualitative content analysis of the interview data provided insights into EFL teachers' perspectives on ICT integration. Additionally, a document analysis and literature review informed the questionnaire development. A total of 150 EFL teachers were selected to validate the questionnaire by completing the items. Exploratory Factor Analysis identified the underlying constructs of ICT integration. Grounded in the SAMR model, the investigation explored the perceived effectiveness of ICT and identified obstacles to optimal utilization in the EFL classroom. The findings contribute to understanding ICT integration in EFL teaching, informing improvements in language education practices at Vietnamese higher education institutions.