That falls under state jurisdiction, so there is no national answer, but I believe its usually 3-4 years.
Bob Foster was elected mayor of Long Beach in 2006.
In 2006 Bob Foster was elected Mayor of Long Beach.
In Middletown, Connecticut, the term for a mayor is two years. The mayor is elected by the city's residents and can serve multiple terms if re-elected.
Andrew was elected Lord Mayor on 27th June 2011
The Mayor of Nashville is elected every four years and is limited to two consecutive terms.
William Hawrelak was first elected as mayor in 1951. He was mayor for three different times. He died in office in 1975.
Depends on the rules (charter, etc.) of the town. In NYC the mayor sits for 4 years, but that may not be true everywhere
Georgia Lord served as the mayor of Goodyear, Arizona, from 2014 to 2020. She was first elected in 2014 and re-elected in 2018. However, she announced her retirement from public office in 2020. Therefore, her tenure as mayor lasted for approximately six years.
Mayor Menino was Boston's longest serving mayor-- he served from 1993 through the end of 2013. He could probably have been re-elected for yet another term, but due to ongoing health problems, he decided not to run again, and Martin J. Walsh was elected Boston's new mayor. He took office in January 2014.
Michael J. "Mike" Moncrief, a life long resident of Fort Worth, is the 43rd mayor of the City of Fort Worth. He was first elected as mayor on May 3, 2003. He was re-elected to his third term on May 12, 2007.
Australia does not have a president. The government is run by a Prime Minister. The Prime Minister is elected for a maximum of three years per term, but there is no limit to how many consecutive terms they can be elected to office.
The government of a city or town is determined by that community. They can put terms limits in place if they wish, but you will have to check the laws for the specific place you are asking about.