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- Wilkins David LStar, ID
- Wilkins Metal Works LlcMiddleton, ID
- Wilson, Nelson M:wilson, Karen ECaldwell, ID
- Wilson's Tree & Shrub ServiceMoscow, ID
- Window Covering OutletBoise, ID
- Window World OF Spokane LlcHayden, ID
- Windows Doors & More Store LlcLewiston, ID
- Wired Up ElectricLewiston, ID
- WM Welch CorpPost Falls, ID
- Wolf ConstructionAthol, ID
- Wolf Plumbing LlcRathdrum, ID
- Wolverine Creek Energy LlcIona, ID
- Wood's Crushing & Hauling IncSandpoint, ID
- Woodland Properties LPNampa, ID
- Woods Creek Plumbing IncBellevue, ID
- World Domes ContractorsIdaho Falls, ID
- Wormell's Floor Cvrng InstlltnLewiston, ID
- Wray PlumbingPonderay, ID
- Wright Brothers The Building Company Eagle LlcEagle, ID
- Wrightway Mechanical LlcLewiston, ID
- Wyatt Electric And Const LlcCoeur d Alene, ID