Isobaric (meaning of the same weight or pressure) may refer to:
- in thermodynamics, an isobaric process, i.e., one that is carried out at constant pressure;
- in mass spectrometry, ions with the same mass, e.g., isobaric peptides, namely peptides with the same molecular weight.
- isobaric speakers have a speaker design where two drive units are mounted in tandem usually made with subwoofers.
- an isobaric differential equation