I've had the opportunity to travel this great state a lot, and occasionally I'll pass through a community and notice their town slogans. Here are a few of my favorites...

Wright: "Wright Time... Wright Community...Wright Now!"

Lovell: "The Rose City of Wyoming"

Meeteetse: "The Ferret Capital of the World"

Riverton: "We've Got All The Civilization You Need" 

Saratoga: "Where the Trout Leap in Main Street"

Upton: "The Best Town On Earth"

Rock Springs "Home of 56 Nationalities"

Douglas "Jackalope Capital of the World"

Cody "Rodeo Capital of the World"

Cokeville ""Welcome to the Open Range!"

Thermopolis "A Past To Behold A Future To Uphold"

And if that didn't satisfy your town motto craving, check out some more from Wikipedia!