In a mixed-methods study, the authors investigate teacher typologies of elementary teachers (N = 132) in the United States based on their reformed science teaching beliefs. Additionally, the identified teacher typologies were compared with respect to their science content knowledge, self-efficacy and epistemic beliefs. Results revealed three clusters of teachers with different combinations of teaching beliefs and practices. Comparative analysis indicated significant differences among teacher typologies with respect to their epistemic beliefs and teaching efficacy beliefs. Additionally, interview results enhanced the depth of understanding of participants' views for reformed science teaching and further highlighted differences in the typologies. Study implications are considered with regard to improving teacher quality and preservice teacher training.