Electronic Health (eHealth) systems show a growing trend in developing countries to enhance their respective healthcare services. However, there is a lack of empirical study regarding readiness during preparation for eHealth implementation in Primary Health Care (PHC) units, specifically for antenatal care health workers who serve not only for personal care but also community services. The survey-based data applied in this research describes the assessment of the pre-implementation of the Electronic Pregnancy Registration and Monitoring System amongst health workers who involved in ANC services in primary health care (PHC) units of South Tangerang district, an urban area of Banten Province, Indonesia. Primary data was collected from 210 ANC health workers who work in 6 PHCs of the district. The data consists of socio-demographic factors of respondents such as age, education, years of experience etc., and captures individual responses to measure their readiness for eHealth adoption. The availability of this data will provide valuable information for researchers, healthcare organisations and government as the policy makers to prepare strategies with regard to readiness for eHealth adoption amongst health workers in PHCs