txjourneyman is right on when he said it varies greatly based on what part of the state you are in because Texas is so big. I heard a stupid little fact several weeks back saying that it is shorter to drive from Dallas to Chicago than it is to drive from the two furthest points in Texas. If that is true, then it would be like asking what size deer are there in Texas, Oklahoma, Nebraska, etc...

I know where I hunt, a 130 class buck is something to be really proud of. Some of the biggest bucks I have ever seen have come out of South Texas. Now, if you are talking about deer population, then Texas has one of the biggest, mainly due to the state's size.