Long-running conventions

The first sf convention was held in 1936 in Philadelphia (see Early Conventions for a list of all the convention during the first ten years). Here's a list of all cons of which there have been fifty or more. (Counting cons for 2018 not yet held, but scheduled as of November 2, 2018.)

The Covid-19 epidemic caused the cancellation or postponement of many cons which had been scheduled for 2020.

Convention	Location	Started	Count	Notes
Worldcon	Earth	July 1939	79	not held during War years
Philcon	Philadelphia	Oct 1936	over 70	It's not quite clear how many there were as Philcon history is not well documented.
Eastercon	UK	Whitsun 1948	73	not held 1950-51, 2020 just had bid session
Westercon	Western North America	Sept 1948	73	not held 2020
Midwestcon	Cincinnati	1949	71	including "Midwestcon 0"
Australian Natcon	Australia	Mar 1952	58	not held 1957, 1959-65, 1967-68, 2020-21
Lunacon	New York City	May 1957	60	the 2018 Lunacon was cancelled, and the future of the con is uncertain
DeepSouthCon	Old South	July 1963	59	Normally piggybacks on other cons.
Boskone	Boston	Sept 1965	59	There were five more Boskones in an early series in the 40s which had been forgotten by the time the modern Boskone began. There were two in 1966.
Minicon	Minneapolis	Jan 1968	55	There were two in both 1971 and 1974. Not held 2020
MileHiCon	Denver	Nov 1969	53	began as OctoCon
ChambanaCon	Central Illinois	1971	50	not held in 2020

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Conrunning

This is a conrunning page.