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Streptococci are a type of bacteria that can cause severe illnesses in humans and animals. Some typical species like <i>S. suis</i>, or atypical species like <i>S. porcinus</i> and, <i>S. dysgalactiae subsp. dysgalactiae</i>, can cause infections like septicemia, meningitis, endocarditis, arthritis, and septic shock. <i>S. suis</i> is considered a newly emerging zoonotic pathogen. Although human streptococcal infection outbreaks are rare, it is appropriate to review the main streptococcal species isolated in pig farms in western Romania, due to the high degree of antibiotic resistance among most isolates commonly used in human treatment. This study examines the resistance patterns of these isolates over 5 years (2018–2023). The research investigated the antimicrobial susceptibility of 267 strains of <i>Streptococcus</i> spp. isolated from pigs, primarily from lung and brain tissues. This report is the first to describe the distribution of atypical <i>Streptococcus</i> species (SDSE, <i>S. porcinus</i>, <i>S. hyovaginalis</i>, <i>S. pluranimalium</i>, <i>S. canis</i>) in Romania, as well as the antibiotic resistance profile of these potentially zoonotic species. It is important to re-evaluate and consider the high rates of resistance of <i>S. suis</i> to tetracyclines, lincosamides, macrolides, and aminoglycosides, as well as the high recovery rates of <i>S. suis</i> from the lungs and brain when treating swine diseases.