42 branches
| Branch | IFSC | MICR | Centre |
|---|---|---|---|
| Amrut Nagar Ghatkopar West Branch | COSB0000154 | 400164050 | Mumbai |
| Andheri | COSB0000047 | 400164015 | Mumbai |
| Bandra | COSB0000043 | 400164013 | Mumbai |
| Bhandup West | COSB0000142 | 400164038 | Mumbai |
| Borivali East | COSB0000122 | 400164033 | Mumbai |
| Borivali West | COSB0000024 | 400164007 | Mumbai |
| C P Tank Branch | COSB0000147 | 400164046 | Mumbai |
| Chembur | COSB0000042 | 400164012 | Mumbai |
| Coloba Branch | COSB0000143 | 400164039 | Mumbai |
| Cosmos Co-operative Bank IMPS | COSB0000025 | 400164001 | Mumbai |
| Dadar West | COSB0000012 | 400164002 | Mumbai |
| Daftari Road Malad East Branch | COSB0000150 | 400164044 | Mumbai |
| Dahisar-E | COSB0000119 | 400164031 | Mumbai |
| Eksar Road Boriwali West | COSB0000141 | 400164037 | Mumbai |
| Fort | COSB0000036 | 400164010 | Mumbai |
| Ghatkopar | COSB0000034 | 400164009 | Mumbai |
| Girgaon Branch | COSB0000140 | 400164042 | Mumbai |
| Goregaon | COSB0000102 | 400164025 | Mumbai |
| Goregaon-W | COSB0000120 | 400164030 | Mumbai |
| Jogeshwari East Branch | COSB0000149 | 400164045 | Mumbai |
| Kandivali West | COSB0000023 | 400164006 | Mumbai |
| Lower Parel | COSB0000156 | 400164052 | Mumbai |
| M V Road Andheri East | COSB0000146 | 400164036 | Mumbai |
| Malad | COSB0000046 | 400164014 | Mumbai |
| Malad ,w | COSB0000099 | 400164023 | Mumbai |
| Matunga - E | COSB0000100 | 400164024 | Mumbai |
| Mulund East | COSB0000121 | 400164032 | Mumbai |
| Mulund West | COSB0000022 | 400164004 | Mumbai |
| Pump House | COSB0000155 | 400164051 | Mumbai |
| S M Shetty School Powai Branch | COSB0000919 | 400164019 | Mumbai |
| Sakinaka Andheri East Branch | COSB0000148 | 400164043 | Mumbai |
| Santacruz-E | COSB0000118 | 400164026 | Mumbai |
| Sector Vashi Branch | COSB0000153 | 400164049 | Mumbai |
| Sion Branch | COSB0000145 | 400164041 | Mumbai |
| Thakur Vidyamandir Branch | COSB0000911 | 400164016 | Mumbai |
| Thane | COSB0000040 | 400164011 | Mumbai |
| Vakola Market Road Santacruz East Branch | COSB0000152 | 400164048 | Mumbai |
| Vashi | COSB0000029 | 400164008 | Mumbai |
| Veera Desai Road Andheri West | COSB0000124 | 400164034 | Mumbai |
| Vikhroli Branch | COSB0000144 | 400164040 | Mumbai |
| Vile Parle East | COSB0000017 | 400164003 | Mumbai |
| Zaveri Bazar | COSB0000021 | 400164005 | Mumbai |
