This article attempts to probe the level of creative thinking of teachers at Philadelphia University in Jordan, and to define its relation with several independent demographic variables, namely age, gender, duration of experience, specialization, and personality types and traits. To accomplish this purpose, three questionnaires are administered on a randomly-chosen sample of (90) teachers at Philadelphia University, Jordan. Findings point out that personality traits included in the study are found available in teachers of Philadelphia University at meager proportions. They can be arranged according to degree of availability in the following descending order: amiable, persevering, savvy, courageous and daring, intelligent, insightful, dynamic and active, and independent. The level of creative thinking of teachers at Philadelphia University is found to be somewhat moderate. Besides, there is no statistically significant relation between the creative thinking of teachers studied and each of the following demographic variables: gender, age, experience, and personality types. Specialization and amiability are concluded to affect the level of creative thinking: the first positively and the second adversely. The other personality traits studied are not available in proportions that considerably affect the level of creative thinking of teachers. As for personality types, they were found to be mainly Epimetheans and Apollonians. Several conclusions and recommendations concerning the teaching-learning environments and processes are outlined.