The League of American Bicyclists updated their webpage with a link to the American Community Survey's data on bike and pedestrian commuting for the 70 largest cities and 375 more cities where data was available. Portland, OR and Davis, CA are tops.
The estimated data is from the 2010 Census and can be sorted to easily find a particular city (if it was over 65,000 in population and had data available). While the average bike commute rate in 2010 in the U.S. is .53%, it represents a 40% increase from 2010. Only 'bike/walk-to-work' trips are listed - total biking and walking trips are much greater. Two spreadsheets are described and linked below.
"A look at the country's 70 largest cities shows that the communities that have done the most to promote bicycling through engineering, education, encouragement, enforcement, and evaluation – determined by the League's Bicycle Friendly America program – have seen greater increases in bike commuting over the past decade than non-Bicycle Friendly Communities.
Portland was highest with 6% commuting by bike, followed by Seattle with 3.6%, and San Francisco and Minneapolis at 3.5%.
A look at the 2010 Bike Commuter Statistics for 375 cities shows the college towns of Davis, CA at 22.1%, followed by Boulder, CO at 9.9%, and Eugene, OR at 8.3%.
The multi-column data on both tables (70 cities and 375 cities) can be sorted by using the "click to edit" function on the top right.
FULL STORY: 2010 Bike Commuting Data Released

Rethinking Redlining
For decades we have blamed 100-year-old maps for the patterns of spatial racial inequity that persist in American cities today. An esteemed researcher says: we’ve got it all wrong.

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

Walmart Announces Nationwide EV Charging Network
The company plans to install electric car chargers at most of its stores by 2030.

Seattle’s Pike Place Market Leans Into Pedestrian Infrastructure
After decades of debate, the market is testing a car ban in one of its busiest areas and adding walking links to the surrounding neighborhood.

The World’s Longest Light Rail Line is in… Los Angeles?
In a city not known for its public transit, the 48.5-mile A Line is the longest of its kind on the planet.

Quantifying Social Infrastructure
New developments have clear rules for ensuring surrounding roads, water, and sewers can handle new users. Why not do the same for community amenities?
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
City of Moorpark
City of Tustin
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
Regional Transportation Commission of Southern Nevada
Toledo-Lucas County Plan Commissions