http://thefederalistpapers.org/us/these-three-maps-of-islam-in-america-should-scare-everyone
According to this Texas has almost 400 Mosques, though a Conservative source, I am not so sure.
Texas has become a minority-majority state like Calif., Hawaii and New Mexico; Nevada and Arizona may become such in the next few decades as well.
Make that just over 300 Mosques, still seems like a high number. Houses as Mosques maybe? Like some Chinese Buddhist Temples in the US operate out of houses.