At a glance: Connecticut Connecticut has a population of 3,675,069 residents across its 5,540 square miles, according to the U.S. Census Bureau. The state ranked No. 32 for business in 2024 by CNBC. Connecticut is home to key economic industries, including finance, insurance, manufacturing, healthcare and technology. Energy Connecticut ranks 41st for energy production, nuclear, noncombustible renewables, and wood and waste as the main products, according to the U.S. Energy Information Administration. The state ranks 43rd for energy consumption, with coal, nuclear, and natural gas the main sources. Connecticut’s residential electricity rate is $0.299/kWh, significantly more than the national average of $0.16/kWh. Commercial users pay $0.199, above the national average of $0.126. Industrial users pay $0.1569/kWh, above the national average industrial rate of $0.0804/kWh. Residential natural gas prices average $18.88 per thousand cubic feet, 28% higher than the national average of $14.75, according to the most recently available data from the U.S. Energy Information Administration. Environment Annual carbon emissions increased by 37.3% since 1970, as the state’s population raised, going from 3.1 million to 3.6 million. The U.S. Fish & Wildlife Service lists 11 species in Connecticut as threatened or endangered.
