Juan R. Liwag Memorial High School (abbreviated as JRLMHS; Filipino: Pang-alaalang Mataas na Paaralang Pambansa ng Juan R. Liwag) is a secondary public school in Barangay Bayanihan, Gapan, Nueva Ecija, Philippines.

It was established in 1945 and made into a national high school by virtue of BP Blg.

It now offers special science class for students inclined in advance mathematics and sciences, sports oriented curriculum, and the regular general secondary (high school) programs.

The student population of JRLMHS today is estimated to be over 5,000, making it one of the biggest public high schools in the province of Nueva Ecija.

It also has the highest student population in the fourth congressional district (southern part) of the province, comprising the city of Gapan and the municipalities of Cabiao, General Tinio (Papaya), Jaen, San Antonio, San Isidro, San Leonardo, and Peñaranda.