Two
3 Consecutive Terms
A mayor is allowed to serve up to 2 terms. That's 4 years.
2 4-year terms
two-four year terms
In Winnipeg, a mayor can serve a maximum of four consecutive terms. Each term lasts four years, so this allows a mayor to serve for a total of 16 years if re-elected. After serving four consecutive terms, a mayor is ineligible to run for re-election until they have been out of office for at least one term.
The mayor of Philadelphia, Pennsylvania, can serve a maximum of two consecutive terms. Each term lasts four years, and after completing two terms, a mayor must take a break before running again. There is no lifetime limit on the number of terms a person can serve, as long as they are not consecutive.
A mayor's term for Alaska is three years. But I don't know how many terms they may serve.
I suppose it would depend on the city, but surely many cities do not have any term limits and mayors have been known to serve for many terms.
Ed Koch was the 105th Mayor of New York City, serving for 3 terms from 1978 to 1989. He had previously served in the U. S. House of Representatives.
In Baltimore City, Maryland, there are no term limits for the position of mayor. A mayor can serve an unlimited number of four-year terms, provided they continue to win re-election. This allows individuals to remain in office as long as they maintain public support and successfully campaign for additional terms.
The Mayor of Tampa serves a term of four years. There are no term limits, allowing a mayor to serve multiple consecutive terms if re-elected. The mayoral elections are held in even-numbered years.