This seemingly indestructible and crafty creature lives in the dark and may represent unconscious, dark belief patterns that steal, rob, and multiply easily, spreading diseased thoughts They scatter when they come in contact with the light, and thus defy consciousness.... Ariadne's Book of Dream
To dream of a cockroach indicates that you are seeking inner solace and attempting to refresh your mental well-being. You need to make some changes and alterations to your opinions, behavior, or goals.... Dream Symbols and Analysis
To see cockroaches in your dream, signifies your need for renewal and self-cleansing of your mental, emotional, or spiritual being. You need to rethink major aspects of your life.... My Dream Interpretation
Seeing and at times just thinking about cockroaches makes a person feel squeamish and repulsed. When dreaming about these dreaded insects, the unconscious mind may be hinting to the dreamer that he needs to reevaluate and reassess a major part of his life. There is never just one roach; thus, the areas of life that need cleansing and renewal may be deep and wide.
The negativity or contamination that is represented by the roaches may affect a great deal of your life. Thus, this may be a call to clean your psychological, emotional, and spiritual self. (Also, examine your motives!) On a less dramatic note, cockroaches in our dreams may be associated with food and uncleanliness, so don’t leave the dishes for tomorrow!... The Bedside Dream Dictionary