Now 20% Car-Free, Seattle's Population is Growing. Its Traffic is Not.

Since 2017, the number of cars in the city has stayed roughly the same, even as the population continues to grow.

1 minute read

September 9, 2025, 10:00 AM PDT

By Diana Ionescu @aworkoffiction


Man with two shepherd-type dogs crossing crosswalk in urban Seattle, Washington.

Pedestrians in Seattle, Washington. | Colleen Michaels / Shutterstock

While Seattle’s human population is growing rapidly, the number of cars in the city has stalled. 

According to an article by Doug Trumm in The Urbanist, “Between 2017 and 2023, Seattle added 35,000 households, but just 3,300 cars, new Census data has revealed — in news that is music to urbanist ears.” The number of vehicles in the city has stayed relatively unchanged even as the population grew, signaling the city’s success in offering the possibility for residents to go car-free.

“In fact, the rate of car ownership appears to be down about 10% in just six years time, and the share of households that are carless grew 25%, reaching 20% of all Seattle households, according to Census data.” About 90 percent of car-free households were renters. 

In 2023, a record 20 percent of Seattle households did not own cars. The city had 127 vehicles for every 100 households. In the 2017 to 2023 time range, the city added about 80,000 residents and only 3,300 cars.

Sunday, September 7, 2025 in The Urbanist

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

September 16, 2026 - Zachary Whalen

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

A cluster of wind turbines beneath a stormy sky, above a forest where the leaves are beginning to change colors.

5 New England states march closer to 800 megawatt wind energy project

Securing federal approval for the project may be complicated under the Trump administration, which has historically been hostile towards domestic wind power.

6 hours ago - Inside Climate News

People boarding a bus on Maryland's Orange Route.

Baltimore to break ground on $50 million Transit Priority Project

The project will bring faster bus trips, safer streets and better bike connections to Baltimore.

7 hours ago - Mass Transit

A brick building with a circular sign with the Airbnb logo hanging off of it.

Airbnb launches $250 million 'last-dollar financing' housing accelerator, makes first investment in Austin

The company will put $6.4 million towards affordable housing development in Texas’ capital.

September 16 - Smart Cities Dive

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.