Class 61

Class 61 may refer to:
 * DRG Class 61 - a class of streamlined German tank locomotives
 * JNR Class C61 - a class of Japanese 4-6-4 locomotives
 * JNR Class D61 - a class of Japanese 2-8-4 locomotives
 * KTM Class 61 - a class of Malaysian 4-car diesel multiple units