We are very pleased to present to you the special section of the Journal of Modern Power Systems and Clean Energy on the coordinated planning, operation, and control of electricity and natural gas infrastructures. This special section aims at addressing the existing challenges in integrated planning, operation and control of natural gas and electric power systems that will enhance the resilience, economics, efficiency, reliability sustainability, and security of both infrastructures. We had invited original submissions from various countries focusing on the computational and technological aspects of the integrated natural gas and electric power systems. The development of sustainable, affordable, and clean sources of energy is considered a prerequisite for today’s global economic strength and will benefit tomorrow’s resilient society. Under the impetus of competition in the energy industry, the unbundling of the electricity sector has introduced new technologies for the generation and the delivery of electricity, which signify less pollutant, highly efficient, and less costly ways of supplying the electricity. The large-scale integration of variable and renewable generation units will require an installed generating capacity that can respond quickly in power systems, and the deployment of natural gas-fired generation units will continue to serve this critical mission and play an indispensable role in power system operation and control. It is envisioned that cheap supply of natural gas, abundant quantity of renewable energy, and greater use of smart grid for promoting customer participations in managing the daily electricity load will reshape the global energy profile in upcoming years. However, there are many challenges that require further research and development corresponding to the planning, operation and control of integrated natural gas and electricity infrastructures. New tools are desired to manage the coupling between natural gas and electric power system, and innovative methods are sought to analyze the impact of uncertainty on the integrated energy systems. This special section includes a total of eleven articles which discuss the above issues, introduce analytical methods for solving the pertinent problems, and present the results in detail in order to introduce the audience with the integration of these two very critical and highly diverse energy infrastructures. The eleven articles included in the special section are summarized and categorized into four groups as follows: 1) Planning of integrated natural gas and power systems; 2) Economic operation of integrated natural gas and power systems; 3) Network analyses of integrated natural gas and power systems; 4) Market issues for integrated natural gas and power systems.