- Wentworth
- Wentzville
- Wesco
- West Alton
- West Plains
- Westboro
- Weston
- Westphalia
- Wheatland
- Wheaton
- Wheeling
- Whiteman Air Force Base
- Whiteoak
- Whiteside
- Whitewater
- Willard
- Williamsburg
- Williamstown
- Williamsville
- Willow Springs
- Windsor
- Windyville
- Winfield
- Winigan
- Winona
- Winston
- Wolf Island
- Wooldridge
- Worth
- Worthington
- Wright City
- Wyaconda
- Wyatt
- Yukon
- Zalma
- Zanoni