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Top 12 Smart Cities in the U.S. – Smart City List

Summary

The U.S. is home to 12 standout smart cities — led by New York City, San Jose, and Chicago — that are using IoT sensors, AI, and connected infrastructure to improve traffic, sustainability, public safety, and utility management. From Columbus leveraging a federal grant to cut emergency response times by 15%, to Denver reducing peak grid strain by 31% with networked solar and storage, these cities prove smart city outcomes are measurable and scalable. Digi International powers the connectivity backbone behind many of these deployments through its cellular routers, IoT gateways, and remote device management platform. With the global smart city market projected to hit $1.4 trillion by 2030, the race to build secure, reliable urban connectivity infrastructure is well underway.

Jayna Locke Jayna Locke, Digi Consultant, Digi International
 July 08, 2026

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12. Phoenix, AZ

Phoenix earns its place on the smart city list through its regional Smart Region initiative, which is a multi-municipality collaboration deploying IoT sensors across Maricopa County roadways and public assets.

Smart city project priorities include adaptive traffic signals, EV charging infrastructure, and real-time air-quality monitoring suited to an extreme-heat climate. As one of the fastest-growing U.S. cities, Phoenix's investment in scalable digital infrastructure positions it as one of the smartest cities in the U.S. to watch as we head toward smart cities 2030.

11. Columbus, OH

Columbus transformed a $50M federal Smart City Challenge grant into more than $500 million in combined smart city funding. Connected vehicle technology deployed at 85 intersections cut travel times 17% and reduced emissions by 12%. Vehicle-to-infrastructure communication in more than 600 city vehicles, including buses and emergency units, reduces emergency response times by 15% by automatically triggering green signals.

Columbus demonstrates that mid-sized cities can execute large-scale smart city solutions and land among the smartest cities in the U.S. without a massive tech budget.

10. San Francisco, CA

San Francisco tops the CoworkingCafe 2025 Smart City Index with a score of 70, boasting the highest concentration of AI and IoT companies nationwide.

San Francisco smart city infrastructure includes real-time transit data across SFMTA, smart water meters citywide, and a seismic sensor network that automatically slows BART trains and opens fire station doors up to 15 seconds before shaking begins.

While there are a number of smart city California initiatives, San Francisco truly shines, demonstrating how smart city technology can serve both daily convenience and emergency resilience simultaneously.

9. Denver, CO

Denver's smart city project centers on climate resilience. The city has networked more than 50,000 residential solar installations, 200+ battery storage sites, and commercial building systems — cutting peak grid strain by 31% and increasing renewable energy use by 42% since 2023.

Smart mobility platforms provide commuters with real-time multimodal routing, and aggressive EV charging expansion supports zero-emission goals. Denver shows how smart city technology can simultaneously address sustainability mandates and reduce long-term operational costs — a model for smart cities by 2030.

8. Seattle, WA

Actelis Networks to upgrade its Intelligent Transportation System with hybrid-fiber technology powering traffic signals, cameras, and congestion monitoring.

CoworkingCafe ranks Seattle among the top U.S. smart cities, citing 175 free Wi-Fi hotspots, a strong zero-waste program, and leading broadband speeds. Seattle's dynamic smart parking system adjusts pricing based on real-time occupancy, reducing circling traffic and emissions.

7. Austin, TX

Austin's Smart Mobility Program uses sensor data to optimize traffic signal timing and reduce congestion, while 622 EV charging stations support one of the densest electric vehicle networks among U.S. mid-sized cities.

CoworkingCafe ranks Austin fifth nationally with a smart city score of 50, reflecting strong IoT industry growth and tech job expansion. Autonomous shuttle pilots at UT Austin and an open-data initiative round out a smart city project portfolio that earns Austin its ranking among the top smart cities in the nation.

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6. Washington D.C.

Washington, D.C. leads among smart cities in the United States for digital governance, transparency, and sustainable transit.

The District features 110 free Wi-Fi hotspots, extensive EV promotion, and a high share of electric and hybrid public transit vehicles. D.C.'s open data platform makes city operations accessible to residents and researchers alike. Its proximity to federal smart cities programs and policymaking bodies gives the district a structural advantage in shaping smart cities initiative U.S. standards, and in accessing smart city funding ahead of peers.

5. Boston, MA

The Boston smart city plan was one of the first in the United States. One of Boston's key ideas is that instead of just collecting data using smart devices, they would make it possible for residents to submit data to the city.

For example, residents can use different apps to report potholes in the street, report various problems with city infrastructure and even communicate with city officials. There's even an app for Boston residents to track their child's school bus. Boston hopes that over time the data they collect can be used to alleviate traffic congestion as well as improve the services that the city offers to its residents.

4. Los Angeles, CA

Los Angeles earns its place among the top 5 smart cities through infrastructure scale and sustainability ambition. LA leads all U.S. cities with 1,605 EV charging stations and operates one of the most advanced adaptive traffic management systems in the country.

Smart streetlights deployed across thousands of city blocks function as IoT data nodes to monitor traffic, air quality, and pedestrian activity simultaneously.

As a smart city California leader, Los Angeles sets the benchmark for how smart cities examples translate into measurable energy, mobility, and safety outcomes at metropolitan scale.

3. Chicago, IL

The Chicago smart city legacy is anchored by the Array of Things (AoT) project. This initiative utilizes a citywide IoT sensor network built with the University of Chicago and Argonne National Laboratory that captures real-time data on air quality, traffic, and environmental conditions.

The initiative has attracted interest from 90 cities globally. Chicago's smart water system uses acoustic sensors to detect pipe leaks early, saving $15 million annually and reducing water loss by 16%. Few cities rival Chicago in open-data-driven smart city innovation.

2. San Jose, CA

San Jose is the heart of Silicon Valley and a benchmark for what a smart city California deployment looks like at full maturity.

San Jose leads all U.S. cities in tech job availability at 57.53 postings per 1,000 jobs, with major employers including Apple, Google, and Adobe driving smart city innovation, including sustainability projects, mobility solutions and autonomous vehicles.

The city's Digital Inclusion Fund, smart streetlight network, open sensor data platform, and connected transit investments make San Jose one of the most comprehensively deployed smart cities in the U.S.

1. New York, NY

New York City ranks first on our list of smart cities in the U.S. for the unmatched breadth and scale of its connected infrastructure. The LinkNYC program replaced thousands of payphones with smart kiosks providing free Gigabit Wi-Fi, device charging, and environmental monitoring.

The NYC Department of Environmental Protection (DEP) manages wireless meters across 800,000+ buildings in the city's largest IoT deployment. The NYC Smart City Testbed Program accelerates emerging technology pilots across agencies continuously. With formal IoT governance covering privacy, security, and equity, New York City defines what a leading New York smart city achieves.

New York City completed the largest urban traffic management upgrade in the world to overhaul aging infrastructure, improve efficiency and reliability, reduce congestion on surface streets and save costs. The project, which utilizes cellular routers at intersections throughout the city, is designed to not only improve traffic flow, but also to integrate connected vehicle technology to improve safety on city streets.

NYC is the most densely populated city in the United States, and city officials are doing amazing work to utilize smart technologies and next-generation solutions to improve New York's infrastructure for everyone who lives there.

 

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