Respondents who were more likely to agree that they did not know who to contact if they had a problem with council tax were aged 16-34 years, disabled or full-time students.
Roedd ymatebwyr a oedd yn fwy tebygol o gytuno nad oeddent yn gwybod â phwy y dylent gysylltu pe bai ganddynt broblem gyda'r dreth gyngor yn 16 i 34 oed, yn anabl neu'n fyfyrwyr llawn amser.