According to Autism Speaks, the non-profit research and awareness organization, 2.7 percent of children and 2.2 percent of adults in the United States have autism.
So, in a church of just 200, at least two children and two adults probably have autism. 
Your church probably has autistic brothers and sisters attending.
Autistic people can feel intimidating to those of us who don’t understand much about it.
Autistic folks may or may not be able to read social cues, may dress differently, speak differently or not speak at all. 
They may not easily fit into the usual Sunday school classes, youth groups, and adult community groups.
They may need quiet spaces, breaks from worship or group meetings, and predictability. 
The key to reaching out to the autistic and their families is knowing what it is.. and how to love and serve them well as the body of Christ!

https://women.pcacdm.org/how-can-the-church-serve-families-touched-by-autism/