I knew I was confused, (I am a Senior) and I just realized the error. The former town of Stateline was the one in Clark County/Jean/Primm and Lake Tahoe, has the real one.

But there was also, the Stateline Hotel and Casino which was located in West Wendover, straddling the Nevada/Utah border. But, there is also Stateline Casino, Mesquite, NV.

Not to be left out, there's Stateline Casino, Bainville, MT.

Maybe I missed some more of them?