This study aims to produce an andragogy-based English module that is valid, practical and has a potential effect on student learning outcomes in semester 2 of Muhammadiyah University of Palembang. The research procedure used the Rowntree model, namely: planning, development, and evaluation. In the evaluation stage, Tessmer's formative evaluation model is used which consists of 5 stages, namely: self evaluation, expert review, one-to-one evaluation, small group evaluation, and field test. The result of this research is an andragogy-based English module. Modules are declared valid after being validated by material, language, and module design experts. The results of the one-to-one evaluation of 3 students stated that the students who were the research subjects gave very good responses to the andragogy-based module. The module is declared practical based on the results of one-to-one evaluations and small group evaluations. The results of the small group evaluation of 8 students obtained an average value of student responses to all aspects assessed at 82.47 in the practical category. The module is stated to have a potential effect on student learning outcomes because at the field test stage for 31 students, an N-gain of 0.58 was obtained, including the moderate category. Suggestions for lecturers, students and universities that this andragogy-based module can be used in learning English as well as for other researchers this andragogy-based module can be used as a reference in developing similar research. Abstrak: Penelitian ini bertujuan untuk menghasilkan modul bahasa Inggris berbasis andragogi yang valid, praktis dan memiliki efek potensial terhadap hasil belajar mahasiswa di semester 2 Universitas Muhammadiyah Palembang. Prosedur penelitian menggunakan model Rowntree, yaitu: perencanaan, pengembangan, dan evaluasi. Pada tahap evaluasi digunakan model evaluasi formatif Tessmer yang terdiri dari 5 tahap, yaitu: self evaluation, expert review, one-to-one evaluation, small group evaluation, dan field test. Hasil penelitian ini adalah modul bahasa Inggris berbasis andragogi. Modul dinyatakan valid setelah divaliadasi oleh ahli materi, bahasa, dan desain modul. Hasil one-to-one evaluation terhadap 3 orang mahasiswa, menyatakan mahasiswa yang dijadikan subjek penelitian memberi respon sangat baik terhadap modul berbasis andragogi. Modul dinyatakan praktis berdasarkan hasil one-to-one evaluation dan small group evaluation. Hasil small group evaluation terhadap 8 orang mahasiswa memperoleh nilai rata-rata tanggapan mahasiswa terhadap semua aspek yang dinilai sebesar 82,47 dengan kategori praktis. Modul dinyatakan memiliki efek potensial terhadap hasil belajar mahasiswa karena pada tahap field test terhadap 31 orang mahasiswa diperoleh N-gain 0,58 termasuk kategori sedang. Saran bagi dosen, siswa dan Universitas agar modul berbasis andragogi ini dapat dimanfaatkan dalam pembelajaran bahasa Inggris dengan sebaiknya serta bagi peneliti lain modul berbasis andragogi ini dapat dijadikan acuan dalam mengembangkan penelitian yang serupa.