* Elementary/Secondary School: To teach theology in a religious school (e.g., Catholic, Protestant, Jewish, etc.), you'd typically need a teaching certification relevant to your location. This often involves a Bachelor's degree in education, with a focus on religious studies or theology incorporated into the program or as a supplementary qualification. The specific requirements vary widely by country, state, and even individual school.
* College/University: Teaching theology at the college or university level requires a doctoral degree (Ph.D. or Th.D.) in theology or a closely related field. A Master's degree might suffice for some adjunct or assistant professor positions, but a doctorate is the standard for tenure-track positions. Strong research and publication records are also essential.
* Seminary/Religious Institutions: Teaching in a seminary usually requires a doctorate (Ph.D. or Th.D.), often with specialized training in theological pedagogy or related disciplines.
* Informal Settings: Teaching theology in informal settings (e.g., Sunday school, community groups) might not require a formal degree, but strong theological knowledge and teaching skills are still crucial. Many churches or organizations provide their own training programs for these roles.
In summary, the answer is not a single degree. The required education ranges from a teaching certificate with relevant coursework to a doctoral degree, depending on the level and setting of the teaching position.