The isolation and cultivation of algae are vital in phycological research, biotechnology, and industrial sectors. The chapter aims to discuss the techniques for isolating and culturing algae. The use of traditional methods, advanced methods, and other techniques is discussed in this chapter. Traditional methods, such as serial dilution and streak plating, are cost-effective, time-consuming, and inefficient, especially for rare algal species. Recent advancements like optical tweezers, fluorescence-activated cell sorting (FACS), and microfluidic-assisted techniques have enhanced accuracy and efficacy in isolating specific algal strains. Furthermore, improvements in culturing and media formulations have optimized algal growth. Freshwater, marine, soil, and extreme environments are the various sources of algal samples for different studies, highlighting dominant genera across ecosystems. Algae sampling techniques, including water filtration and sedimentation, are essential for capturing organisms in aquatic environments. Conventional isolation methods, such as serial dilution, have been successful, with advanced techniques, like FACS and single-cell micromanipulation, offering better accuracy. Developing nanoparticle-assisted separation methods shows potential for efficient target isolation without harming cell viability. Culturally, batch and agar slant techniques are foundational, whereas continuous systems enable sustained growth in controlled environments. Chemical- and antibiotic-based approaches have also shown efficiency in reducing contamination, but prolonged use causes resistance. Generally, the integration of these approaches supports the efficiency of modern techniques in enhancing algal research and commercialization.