Is there a grant for single mothers in college?

There are Pell grants. Check with the main office of the college you wish to attend and ask who handles the grants. Good luck

Check your state as well. New Jersey has a TAG grant for example.

Aside from the Pell there is also the Perkins Grant. Fill out a Fafsa and ask your student finance for more information. It should be automatic after filing a Fafsa.