Mathematical Sciences
| Institute of Mathematics and Informatics | |
| Institute of Mechanics | |
| Central Laboratory for Parallel Processing | |
| National Laboratory of Computer Virology |
Physical Sciences
| Institute for Nuclear Research and Nuclear Energetics | |
| Institute of Solid State Physics | |
| Institute of Electronics | |
| Institute of Astronomy | |
| National Astronomical Observatory - Rozhen | |
| Astronomical Observatory Belogradchik | |
| Central Laboratory of Solar Energy and New Energy Sources | |
| Central Laboratory for Applied Physics - Plovdiv | |
| Central Laboratory of Optical Storage and Processing of Information |
Chemical Sciences
| Institute of General and Inorganic Chemistry | |
| Institute of Organic Chemistry with a Center of Phyto-Chemistry | |
| Institute of Physical Chemistry | |
| Institute for Catalyses | |
| Central Laboratory for Electrochemical Power Sources | |
| Institute of
Chemical Engineering | |
| Central Laboratory for Photoprocesses | |
| Institute for Polymers |
Biological Sciences
| Institute of Molecule Biology | |
| Institute of Genetics | |
| Institute of Physiology | |
| Institute of Plant Physiology | |
| Institute of Experimental Morphology and Anthropology | |
| Institute of Microbiology | |
| Institute of Botany | |
| Institute of Zoology | |
| Forest Research Institute | |
| Institute of Experimental Pathology and Parasitology | |
| Institute of Biology and Immunology of Reproduction | |
| Institute of Biophysics | |
| National Museum of Natural History | |
| Central Laboratory of Biomedical Engineering | |
| Central Laboratory of General Ecology |
Earth Sciences
| Geological Institute | |
| Geophysical Institute | |
| National Institute of Meteorology and Hydrology | |
| Central Laboratory for Geodesy | |
| Central Laboratory of Mineralogy and Crystallography | |
| Institute of Oceanology | |
| Geographical Institute | |
| Space Research Institute | |
| Central Laboratory of Solar - Terrestrial Influences | |
| Central Laboratory for Seismic Mechanics and Earthquake Engineering | |
| Institute of Water Problems |
Engineering Sciences
| Institute of Metal Science | |
| Central Laboratory of Physico-Chemical Mechanics | |
| Institute of Computer and Communication Systems | |
| Institute of Information Technologies | |
| Institute of Control and System Research | |
| Institute of Mechatronics and Instrumentation |
Humanities
| Institute of Bulgarian Language | |
| Institute of Literature | |
| Institute of History | |
| Institute of Thracology | |
| Institute of Museum of Archeology | |
| Institute of Balkan Studies | |
| Ethnographic Institute Museum | |
| Institute of Art
Studies | |
| Institute of Folklore Studies | |
| Cyrillo Methodian Research Center | |
| Center for Architectural Studies |
Social Sciences
| Institute of Sociology | |
| Institute of Legal Studies | |
| Institute of Economics | |
| Center for Science Studies and History of Science | |
| Institute of Psychology | |
| Institute of Demography | |
| Institute of Philosophical Studies |
Specialized and Supporting Units
| Central Library of BAS | |
| Computer Center - Physics | |
| Academic Publishing House "Prof. Marin Drinov" | |
| Botanical Garden | |
| National Centre on Nanosciences
and Nanotechnology |