There are number of Union Bank Of India Branches In Mumbai, so here I am providing short list of it along with their address

IFSC Code: UBIN0557820
Bank: Union Bank Of India
Business Hours: Monday to Saturday 10 am to 4 pm
Mode Of Payment: Cash,Cheque,Demand Draft and Net banking
Branch: Centralized Backoffice
Contact:
Bank Details: Union Bank Of India Centralized Backoffice UBIN0557820
Remittance Services: NEFT
Location: Mumbai, Mumbai
City: Mumbai
District: Mumbai
State: Maharashtra
Pincode: 400010
Country: IN
Address: Mecantile Mansio Magazine Street Darukhana Reay Road Mumbai Pin 400010

IFSC Code: UBIN0558290
Bank: Union Bank Of India
Business Hours: Monday to Saturday 10 am to 4 pm
Mode Of Payment: Cash,Cheque,Demand Draft and Net banking
Branch: Charkop
Contact: 022-28670740
Bank Details: Union Bank Of India Charkop UBIN0558290
Remittance Services: NEFT
Location: Mumbai(West), Mumbai
City: Mumbai(West)
District: Mumbai
State: Maharashtra
Pincode: 400067
Country: IN
Address: Charkop Shanti Co Operative Housing Society Shop N 1 3

IFSC Code: UBIN0559709
Bank: Union Bank Of India
Business Hours: Monday to Saturday 10 am to 4 pm
Mode Of Payment: Cash,Cheque,Demand Draft and Net banking
Branch: Pimpalgaon Baswant
Contact:
Bank Details: Union Bank Of India Pimpalgaon Baswant UBIN0559709
Remittance Services: NEFT
Location: Nasik, Mumbai
City: Nasik
District: Mumbai
State: Maharashtra
Pincode:
Country: IN
Address: Pimpalgaon Baswant, Nasik, Mah

IFSC Code: UBIN0561371
Bank: Union Bank Of India
Business Hours: Monday to Saturday 10 am to 4 pm
Mode Of Payment: Cash,Cheque,Demand Draft and Net banking
Branch: Central Pension Processing Centre
Contact: 22892522-2510
Bank Details: Union Bank Of India Central Pension Processing Centre UBIN0561371
Remittance Services: NEFT
Location: Mumbai (South), Mumbai
City: Mumbai (South)
District: Mumbai
State: Maharashtra
Pincode: 400021
Country: IN
Address: 7th Floor Central Office Ubi 239 Vidhan Bhavan Marg N Point

IFSC Code: UBIN0561380
Bank: Union Bank Of India
Business Hours: Monday to Saturday 10 am to 4 pm
Mode Of Payment: Cash,Cheque,Demand Draft and Net banking
Branch: Vasai East Gokhivare
Contact:
Bank Details: Union Bank Of India Vasai East Gokhivare UBIN0561380
Remittance Services: NEFT
Location: Mumbai, Mumbai
City: Mumbai
District: Mumbai
State: Maharashtra
Pincode: 401205
Country: IN
Address: Vasai East Gokhivare Branch Mumbai Maharashtra

Here I am telling process for more info about Union Bank Of India branches

Go to the Union Bank Of India official website

Click on branch & ATM locator which is under show button given at the right hand side

By click there you will move on branch locator page which look like given below image