The Nishitetsu Tenjin Ōmuta Line (西鉄天神大牟田線, Nishitetsu Tenjin Ōmuta sen) is a railway line in Fukuoka Prefecture in Kyushu, Japan.

It is the main line of the private railway company Nishi-Nippon Railroad (Nishitetsu).

The line connects Nishitetsu Fukuoka (Tenjin) Station[Note 1] in Chūō-ku, Fukuoka with Ōmuta Station in Ōmuta.

New three- and two-car 9000 series electric multiple unit trains were introduced on the line from March 2017.

[1] The Kyushu Railway (九州鉄道, Kyūshū Tetsudō)[Note 2] built and operated the first Interurban railway line in Kyushu from Fukuoka, planned to extend to Kumamoto, but difficulty in securing a corridor south of Omuta resulted in that plan being abandoned.