Background: Suicidal thoughts and behaviors (STB) are prevalent among American college students, yet only a small percentage of suicidal college students receive mental health treatment. Many avoid seeking help due to help-negation or the refusal to seek available mental health help when needed. To better understand why suicidal college students refuse to seek help, it is essential to assess factors associated with their intentions and behaviors. According to the Theory of Planned Behavior, the stronger an individual's intentions towards a behavior, the higher their potential to perform the behavior. Thus, this study examined factors associated with informal and formal help-seeking intentions and previous help-seeking behaviors among suicidal college students. Additionally, this study compared factors associated with formal and informal mental health help-seeking intentions and previous behaviors among suicide ideators, planners, and attempters. Methods: A cross-sectional study was completed using the 2018-2020 Healthy Minds Study Dataset. Inclusion criteria consisted of respondents aged 18-24 years old who answered 'yes' to having STB and responded to all demographic variables assessed. Independent Sample t-tests, Chi-square analyses, Binary logistic regressions, and Forward Stepwise logistic regressions were utilized to determine the association between selected factors and formal and informal help-seeking intentions and previous behaviors. Results: Various factors were positively associated with informal and formal help-seeking intentions, including being Christian (P =0.009; P =0.011, respectively), in a relationship (P < 0.001; P =0.006, respectively), having a higher perceived need for mental health treatment (P <0.001), and knowledge of mental illnesses and treatments (P <0.001). Previous informal help-seeking behaviors were negatively associated with perceived social stigma (P <0.0001), while previous formal help-seeking behaviors were negatively associated with personal stigma (P = 0.034). Across all three groups (i.e., suicide ideators, planners, and attempters), a higher perceived need was positively associated with previous informal help-seeking behaviors, and positive beliefs in therapy efficacy were positively associated with formal help-seeking intentions. Discussion: Mental health help-seeking among suicidal college students is a multidimensional process influenced by many factors. Future research may include longitudinal and qualitative studies to examine the relationships between informal and formal help-seeking intentions and engagement in mental health help-seeking behaviors. [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://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]