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SF Bay AreaCounty Connection

County Connection 21 bus

Walnut Creek BART / San Ramon

71 % on time

County Connection 21 bus Stop List and Next Departures

The County Connection 21 - Walnut Creek BART / San Ramon bus serves 48 bus stops in the SF Bay Area area departing from Walnut Creek BART and ending at San Ramon Transit Center. Scroll down to see upcoming 21 bus times at each stop and the next scheduled 21 bus times will be displayed. The full 21 bus schedule as well as real-time departures can be found in the Transit app.

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Stops
Wed, May 27, 2026
County Connection Walnut Creek BART / San Ramon map

County Connection 21 bus route map

The County Connection 21 - Walnut Creek BART / San Ramon bus route map is shown above. The route map shows you an overview of all the stops served by the County Connection 21 bus to help you plan your trip on County Connection. Opening the app will allow you to see more detailed information about the route on a map including stop specific alerts, such as stops that have been closed or moved. You can also see the location of vehicles in real-time on the route map so you know when the 21 bus is approaching your stop.

See the detailed route map

County Connection 21 bus Service Alerts

Open the Transit app to see more information about any active disruptions that may impact the 21 bus schedule, such as detours, moved stops, trip cancellations, major delays, or other service changes to the bus route. The Transit app also allows you to subscribe to receive notifications for any service alert issued by County Connection so that you can plan your trip around any active or future disruptions.

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County Connection 21 bus Service Frequency

The next 21 bus leaves Walnut Creek BART at 1:43 PM, and arrives at San Ramon Transit Center at 2:30 PM. You can see the frequency of upcoming trips and the exact departure times by opening the Transit app.

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County Connection 21 bus On-Time Performance

71 % on time

71% of riders report that the County Connection 21 bus arrived on time on their previous trip. In the past 30 days, 6 riders reported on the on-time performance of the 21 bus. Compared to other County Connection lines, the 21 bus is ranked 14 out of 51 County Connection lines. These on-time performance stats are user reported and may differ from official County Connection metrics. See more details about on time, late or early departure reports for the 21 by opening the Transit app.

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County Connection 21 bus FAQ

  • What time does the next County Connection 21 bus depart from Walnut Creek BART?

    The next 21 bus leaves Walnut Creek BART at 1:43 PM, and arrives at San Ramon Transit Center at 2:30 PM. The total trip time for the next County Connection 21 bus is 47 min.

  • Is the County Connection 21 bus running on time, early or late?

    You can track your bus on a map, monitor real-time updates, and see adjustments to the County Connection 21 schedule by downloading the Transit app.

  • When does the next County Connection 21 bus arrive?

    You can see the next County Connection 21 bus times in the app as well as future departure times for the 21 bus.

  • How many bus stops are there for the County Connection 21 bus?

    There are 48 stops on the County Connection 21 bus.

  • Is the County Connection 21 bus usually crowded?

    You can find real-time information on County Connection 21 bus crowding levels in the Transit app (available in select cities or on select trips). You can also see predictions on how crowded the bus will be when it gets to your bus stop.

  • Is the County Connection 21 bus currently running?

    Find out the current status for the County Connection 21 bus in the Transit app.

  • What is the closest County Connection 21 bus stop to me?

    Open the Transit app to see your location on a map and find the closest 21 bus stop to where you are.

Other County Connection bus schedules, routes and maps

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