This　study　aimed　to　investigate　the　bacterial　communities　and　antibiotic　resistance　genes　(ARGs)　in　16　wastewater　treatment　plants　(WWTPs)　treating　municipal,　industrial　and　mixed　wastewater.　Wastewater　types　showed　obvious　effects　on　bacterial　communities　and　functions.　Nitrosomonas,　Nitrospira,　Hyphomicrobium　and　Accunudibacter　were　the　main　functional　genera.　Mycobacterium　was　the　dominant　potential　pathogens.　A　total　of　69　ARGs　were　obtained,　and　the　dominant　ARGs　subtypes　were　similar　in　different　WWTPs.　Efflux　pumps　were　the　most　common　resistance　mechanisms.　Copper　and　zinc　resistance　genes　were　the　main　metal　resistance　genes　(MRGs).　Wastewater　types　affected　the　distributions　of　ARGs　and　MRGs,　and　they　were　more　similar　in　industrial　and　mixed　wastewater.　The　co-occurrence　of　ARGs　existed　within　or　across　ARG　types,　and　they　were　also　positively　linked　to　MRGs,　some　functional　and　pathogenic　genera　or　environmental　factors.　This　study　furthers　the　understanding　of　interactions　between　bacterial　communities,　ARGs　and　MRGs　in　different　WWTPs.