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Island County, Washington Traffic Counts

This page delivers traffic analytics for Island County, Washington. Our metrics are calculated with multi-sourced, cross-verified data from real-world mobile and sensor networks, and averaged for Island County, Washington among 283 road miles divided in 6,742 segments. Our metrics go beyond simple volume counts to provide actionable insights on traffic intensity, congestion, commercial vehicle flow, and network performance with highest possible granularity (average segment length is 221 ft). Whether you are evaluating a new retail location, planning logistics routes, or assessing infrastructure needs, this data helps you move from assumptions to certainty.
Data sourced from TrafficZoom's proprietary analytics platform.
Data current as of:
Q3 2026
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Total Traffic Volume & Performance

Traffic

Traffic

The average number of vehicles that travel each day over any road in the road network.

3,573

Trucks

Trucks

The percentage of the total traffic volume composed of heavy vehicles.

5.4%

Average travel time

Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

33.9 min

Congestion ratio

Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

15.2%

Drivers’ average age

Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

47.5 yrs

Drivers’ average income

Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$84,419

Our data indicates an estimated average traffic volume of 3,573 vehicles per day in Island County, Washington that results in 1,028,965 vehicle-miles traveled per day (≈376 million per year). The traffic stream is comprised of an average of 1 truck for every 18 vehicles. Typical time spent behind the wheel per trip is 33.9 minutes, which already accounts for delays at signals, intersections, and congestion.

Analytical insight

When compared to the Washington state averages: Island sees 51% lower average daily traffic volume than the state average (3,573 vehicles per day against 7,322), suggesting less demand on each road - a critical factor for logistics and site planning. Network-wide, Island accounts for about 0.7% of Washington's statewide total, at 1,028,965 vehicle-miles traveled per day (≈376 million per year). At 33.9 minutes, the average travel time is 2% higher than the state level. Congestion runs 23% lower than the state level, at a ratio of 15.2% - smoother traffic flow - crucial for traffic control improvement and logistics planning. 53% of counties in Washington see less traffic than Island's 3,573 vehicles per day. Its average travel time of 33.9 minutes is longer than 61% of counties in Washington.

Highway vs. Non-Highway Traffic Analysis

Analytical insight

N/A
non-highway traffic icon

Non-highway traffic

Traffic

Traffic

The average number of vehicles that travel each day over any road in the road network.

3,573

Trucks

Trucks

The percentage of the total traffic volume composed of heavy vehicles.

5.4%

Average travel time

Average travel time

The average time of travel averaged among all vehicles traveling on the road network.

33.9 min

Congestion ratio

Congestion ratio

The rate at which the actual travel time exceeds free-flow travel time, averaged among all roads in the network.

15.2%

Drivers’ average age

Drivers’ average age

Average age of residents in the geographic areas where the vehicle trips originated.

47.5 yrs

Drivers’ average income

Drivers’ average income

Average income of residents in the geographic areas where the vehicle trips originated.

$84,419

The non-highway road network in Island County, Washington supports a substantial volume of traffic. The average non-highway road carries 3,573 vehicles per day. That average covers 283 non-highway road miles divided in 6,742 segments (average segment length 221 ft), together carrying 1,028,965 vehicle-miles traveled per day (≈376 million per year). Trucks constitute 5.4% of non-highway traffic.

Analytical insight

The non-highway congestion ratio of 15.2% is 22% lower than the state level, suggesting more efficient local mobility than the state average. Island's overall average travel time exceeds 61% of counties in Washington. Trip origins here have higher average income than 66% of counties in Washington. The driver population here skews older than 53% of counties in Washington.

Time-of-Day & Seasonal Patterns

peak hours icon
Peak Traffic Windows
Weekday peaks:
AM peak 10:00 AM–12:00 PM and PM peak 2:00 PM–5:00 PM, with volumes reaching approximately 95% higher than the daily average.
Weekend traffic:
Weekend volumes run about 20% below weekday levels.
seasonal traffic icon
Seasonal Fluctuation
Busy season:
June–August is the high season, with volumes +12% versus the annual average.
Lowest month:
January is the quietest month, with volumes -13% versus the annual average.

Analytical insight

In Island County, Washington, the peak hour concentrates about 8% of the day's traffic, and seasonal swing is pronounced at +12% in high season.

Traffic Flow Profile Comparison

Metric

Island

Washington
Average

Difference

Traffic

3,573

7,322

-51.2%

Truck % (Total Traffic)

5.4%

7.1%

-23.6%

Truck % (Highway)

9.5%

Avg. Travel Time

33.9 min

33.2 min

+2.3%

How Island County compares

Island County against nearby areas

Against the 4 nearest areas, Island County moves 16.9% of the total daily travel; it has the fourth busiest roads of the five. Smaller and quieter on both counts: a shorter network than the areas around it, carrying lighter traffic across it.

Island County and the 4 nearest county-level areas by centroid distance, with the Washington average for scale.
AreaAverage daily trafficTruck shareDaily vehicle-milesAverage travel timeCongestion ratio
Island County3,5735.4%1,028,96533.9 min15.2%
Kitsap County, Washington5,6805.6%4,727,59131.5 min15.7%
Snohomish County, Washington8,2145.7%15,764,19832.2 min21.0%
Skagit County, Washington5,3077.6%3,814,19331.9 min17.0%
San Juan County, Washington7976.3%74,15134.4 minN/A
Washington average7,3227.1%N/A33.2 min19.9%

Island County ranked within Washington

Island County sits close to the Washington median on every measure below - no single figure sets it apart from the state as a whole.

Where Island County sits among Washington's county-level areas on each measure. Rank 1 is the highest value in the state, whether or not that is the outcome you want; the field size differs by measure because not every county carries highway data.
MeasureIsland CountyWashington rank
Traffic volume (AADT)3,573#19 of 39
Average travel time33.9 min#16 of 39
Average driver income$84,419#14 of 39
Average driver age47.5 yrs#19 of 39

Data Sources & Methodology

The data presented on this page is derived from TrafficZoom's proprietary analytics platform, which aggregates and normalizes information from multiple sources, including:

Mobile device location data (anonymized and aggregated)

Road sensor networks and traffic counters

Historical traffic pattern databases

Public traffic count programs published by the

WashingtonDepartment of Transportation

Historical traffic pattern databases

U.S. Census Bureau
All metrics represent estimates based on statistical modeling and are intended for strategic planning purposes.
TrafficZoom methodology
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Data current as of:
Q3 2026

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Counties near Island County

The same traffic breakdown for the areas closest to Island County, Washington.

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