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- Wolverine Creek Energy LlcIona, ID
- Wood's Crushing & Hauling IncSandpoint, ID
- Woodland Properties LPNampa, ID
- Woods Creek Plumbing IncBellevue, ID
- Woods Creek Plumbing IncOldtown, 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