Within mental health autism is often included within the area of learning disability - but it is a different. Those people with autism will need support that reflects this.

Some simple guides to a number of Autism related conditions are available from the OAASIS website 

Some of those at the higher level of the Autistic Spectrum Disorder may have average or even above average intellectual abilities.
However people who have a learning disability may also be on the Autistic Spectrum.

This website is not focused on those with Autism but again having Autism does increase the risks of suffering mental ill health.
The National Autistic Society has a range of resources and supports available and these can be accessed via the website or their helpline - links on the right of this page. Have a look at the 'I exist' campaign currently being run by the NAS about adults with Autism
A simple aid to remember the type of support people with Autism require is SPELL

S = Structure

P = Positive

E = Empathy

L = Low arousal

L = Links