Just under 13,000 "registered electors" have been removed from the voting register.
In October last year there 59,703 people registered to vote - a figure that now stands at 47,000.
New forms were sent out to Manx residents at the start of the year - the results from which contributed to the first major system update in nine years.
It's part of efforts to tackle inaccurate figures from old information.
Electoral registration officer Della Fletcher says some of that has now been filtered out:
Man admits to drunk and disorderly allegations in court
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43 per cent of survey respondents recommend Island for a holiday
Beautiful but criminally expensive to get to - that's the verdict on the Isle of Man as a holiday destination.
Moorhouse to ask about effect of Tesco on Shoprite charities
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Manx Utilities seeks approval to store hazardous material in former amenity site
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Social Security launches new messaging platform
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Wildlife Park donates £4,000 towards saving Humboldt penguins on World Penguin Day
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No plans to showcase Manx produce at new L'pool ferry terminal
The chief minister says there are no plans to showcase Manx produce at the new ferry terminal in Liverpool.
Sights Matters IOM's headquarters turns 21 today
The home of a leading visually impaired charity is celebrating it's 21st birthday today.
