The depletion of fossil fuel resources like coal products, natural gas, crude oil, and petroleum products as well as the rise in greenhouse gases has stimulated research into novel methods for locating or creating renewable fuels. Pyrolysis is a thermochemical process for the conversion of biomass to biofuels and energy. Different varieties of biomass feedstocks can be converted to bio-oil, gases, and biochar via pyrolysis. The co-pyrolysis with two or more feedstocks exhibits promising prospects in terms of its efficacy in converting biomass into bioenergy and biorefinery products. Microalgae are another viable alternative to lignocellulose biomass that is currently in use. The microalgal biomass consists of several biomacromolecules, including lipids, proteins, and carbohydrates. This chapter discusses the co-pyrolysis of microalgae with coal and the synergistic effects on their product distribution. Also, the different kinetic models used to evaluate the kinetics of co-pyrolysis are highlighted. Emphasis is given to the future prospects and opportunities of co-pyrolysis of microalgae and coal.