Municipal Corporations or City Corporation or Mahanagar Palika or Mahanagar Nigam are urban local government that works for the development of a city, which has a population of more than one million (ten lakh).
As you have asked about the list of city Municipal Corporation in Maharashtra, I am mentioning them, check below for the details

Mumbai
Mira-Bhayandar
Thane
Navi Mumbai
Kalyan-Dombivli
Ulhasnagar
Bhiwandi-Nizampur
Vasai-Virar
Pune
Pimpri-Chinchwad
Nagpur
Aurangabad
Nashik
Amravati
Solapur
Kolhapur
Sangli-Miraj & Kupwad
Ahmednagar
Malegaon
Jalgaon
Dhule
Nanded-Waghala
Latur
Parbhani
Akola
Chandrapur