Main Difference
The main difference between City and Town is that the City is a large and permanent human settlement and Town is a settlement that is bigger than a village but smaller than a city.
City
A city is a large human settlement. Cities generally have extensive systems for housing, transportation, sanitation, utilities, land use, and communication. Their density facilitates interaction between people, government organizations and businesses, sometimes benefiting different parties in the process.
Historically, city-dwellers have been a small proportion of humanity overall, but following two centuries of unprecedented and rapid urbanization, roughly half of the world population now lives in cities, which has had profound consequences for global sustainability. Present-day cities usually form the core of larger metropolitan areas and urban areas—creating numerous commuters traveling towards city centers for employment, entertainment, and edification. However, in a world of intensifying globalization, all cities are in different degree also connected globally beyond these regions.
The most populated city proper is Shanghai while the largest metropolitan areas also include the Greater Tokyo Area and Jabodetabek (Jakarta). The cities of Faiyum, Damascus, and Varanasi are among those laying claim to longest continual inhabitation.
Town
A town is a form of human settlement. Towns are generally larger than villages but smaller than cities, though the size definition for what constitutes a each of these terms varies considerably in a different part of the world
City (noun)
A large settlement, bigger than a town.
“São Paulo is one of the largest cities in South America.”
City (noun)
A settlement granted special status by royal charter or letters patent; traditionally, a settlement with a cathedral regardless of size.
City (noun)
The central business district; downtown.
“I’m going into the city today to do some shopping.”
Town (noun)
A settlement; an area with residential districts, shops and amenities, and its own local government; especially one larger than a village and smaller than a city.
“This town is really dangerous because these youngsters have Beretta handguns.”
Town (noun)
Any more urbanized center than the place of reference.
“I’ll be in Yonkers, then I’m driving into town to see the Knicks at the Garden tonight.”
Town (noun)
A rural settlement in which a market was held at least once a week.
Town (noun)
The residents (as opposed to gown: the students, faculty, etc.) of a community which is the site of a university.
Town (noun)
Used to refer to a town or similar entity under discussion.
“Call me when you get to town.”
Town (noun)
A municipal organization, such as a corporation, defined by the laws of the entity of which it is a part.
Town (noun)
An enclosure which surrounded the mere homestead or dwelling of the lord of the manor.
Town (noun)
The whole of the land which constituted the domain.
Town (noun)
A collection of houses enclosed by fences or walls.
Town (noun)
A farm or farmstead; also, a court or farmyard.
City (noun)
a large town
“one of Italy’s most beautiful cities”
“the city council”
City (noun)
a town created a city by charter and usually containing a cathedral.
City (noun)
a municipal centre incorporated by the state or province.
City (noun)
a place or situation characterized by a specified attribute
“the staff were in turmoil—it was panic city”
City (noun)
short for City of London
City (noun)
the financial and commercial institutions located in the City of London
“the Budget got a stony reception from the City”
“a City analyst”