Almost 200,000 Victorians could be fined for failing to vote at last year's state election.

The Victorian Electoral Commission (VEC) said letters would be sent to eligible voters who failed to cast their ballot on November 29.

Those who did not have a valid excuse for not voting faced a fine.

"Recipients of the apparent failure to vote notice are advised not to ignore the letter as those who fail to reply may be issued with an infringement notice carrying a $74 fine," the VEC said.

"Voting in the state election was compulsory for all voters enrolled on the state electoral roll at 8:00pm on Tuesday 11 November 2014."

A list of what constituted "a valid and sufficient reason" to vote would not be provided by the VEC.

The VEC said in the 2010 election, 63 per cent of non-voters were fined.

"A large proportion of apparent failure to vote notices are returned with valid and sufficient reasons for not voting," the commission said.