This research aimed primarily at exploring the learning disciplines of support personnel to build a learning organization of Ramkhamhaeng University (RU) and comparing their learning disciplines as categorized by their gender, age, education level, and work experiences. The sample consisted of 334 support personnel of RU. The research tool was a 5-rating scale questionnaire with the reliability coefficient of 0.97. Statistics used to analyze the data included frequency, percentage, mean, standard deviation, t-test, and One-way Analysis of Variance. The findings revealed the high levels of learning disciplines to build a learning organization (LO) among the support personnel both in the overall aspect and in each of the five dimensions. In addition, the support personnel with different gender and age indicated no significant difference in the overall aspect and in each of the five dimensions regarding their learning disciplines to build a LO. However, the aforesaid difference at 0.05 significant level was found among the support personnel with different education level. Moreover, the support personnel with different work experiences indicated their non-significant differences in terms of the overall, and in the aspects of shared vision and team learning, but reported a significant difference regarding personal mastery, mental models, and systems thinking.