San José has just been named the greenest city in the U.S., leading the pack in WalletHub’s 2025 sustainability and green living rankings. The city earned top marks for its renewable energy initiatives and city-wide efforts to reduce emissions and promote clean energy practices. According to a report from San Jose's official website, the city achieved robust results through its San José Clean Energy program and Climate Smart San José plan, collectively improving air, land, and energy quality for its almost one million residents.
San José's commitment to sustainability has propelled the city to chase accolades and build a resilient and healthier city. “San José has never waited for someone else to solve big challenges — we lead,” Mayor Matt Mahan told the City of San José. Under this leadership, the city has dramatically cut its greenhouse gas emissions, attributing the sharpest reductions to the transportation and electricity sectors. Such progress has been buoyed by the community's adoption of electric vehicles, resulting in 40% of new car registrations being electric in 2024.
The methodology behind the WalletHub ranking includes assessing various sustainability measures such as energy consumption, greenhouse gas emissions, and the presence of green jobs. In a separate statement shared by WalletHub, analyst Chip Lupo explains that green cities offer benefits beyond the environment, impacting public health and the local economy through sustainable laws and enhanced infrastructure. These green policies facilitate a lifestyle that significantly lightens the ecological footprint of city dwellers.
Within the broader context of the WalletHub study, San José not only sourced nearly half of its electricity from renewable sources but also led in other environmental categories. This includes achievements like the fifth-highest number of solar panel installations per capita and the fourth-lowest Urban Heat Island Effect Index, which helps maintain a more stable and comfortable city temperature. As part of their green trajectory, San José continues to actively engage the community through various initiatives, such as bike-sharing programs and policies for reducing the consumption of single-use plastics.
