The study aimed to determine the level of influence principal leadership style has on teacher retention compared to teacher self-efficacy alone. A lack of supportive leaders impacts teacher motivation, performance, and retention, contributing to the teacher shortage. The population for this study included PK-12 teachers solicited for participation via social media. The participants were surveyed using an anonymous questionnaire designed specifically for this study. The response rate (N = 75) exceeded the minimum for statistical significance. Research questions one and two examined the associations between principal leadership style and teacher self-efficacy on teacher retention using one-way ANOVA. Research question three examined the influence of teacher self-efficacy and principal leadership style on teacher retention using multiple regression. The results of the one-way ANOVA between principal leadership style and teacher retention were statistically significant F(3, 71) = 3.431, p = 0.022. The results of the one-way ANOVA between teacher self-efficacy and teacher retention were very highly statistically significant F(3, 71) = 9.351, p < 0.001. The results of the multiple regression showed that teacher self-efficacy and principal leadership style statistically significantly predicted teacher retention, F(2, 72) = 12.741, p < 0.001, adjusted R[superscript 2] = 0.241. Principal leadership style was statistically significant to the prediction (p < 0.05), and teacher self-efficacy was very highly statistically significant (p < 0.001). Overall, the results of this study showed a significant association between principal leadership styles and teacher retention and that principal leadership style has a statistically significant influence on teacher retention. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://bibliotheek.ehb.be:2222/en-US/products/dissertations/individuals.shtml.]