Yes Oatmeal is a starch.
Oatmeal is very high in starch content.
Just one cup of starch (81 grams) contains 46.9 grams of Starch.
So if you need to watch your starch intake then do not eat too much oatmeal.
Oatmeal is very healthy for you and can help improve your heart health and build a stronger heart but eating too much starchy foods could be bad.
In moderation though the oatmeal is very healthy for you.
Oatmeal does contain very good and lots of vitamins and minerals needed to help improve your health and keep you healthy.