Pekan has seen a 31 per cent increase in registered voters since 2008.

Daftar pemilik induk 2008

Military – 4961
Police – 241
Overseas – 9
Public – 53802
Total – 59019

Daftar pemilih terkini (latest electoral roll) ST03/2011

Military – 6304
Police – 284
Overseas – 7
Public – 70992
Total – 77587

The figures are contained in a reply to Parliament by Minister in the Prime Minister’s Department Nazri Abdul Aziz in March 2012.

Other constituencies with significant increases:
Merbok – 20%
Bayan Baru – 20%
Bukit Gantang – 21%
Tambun – 20%
Gopeng – 20%
Hulu Selangor – 20%
Kuala Selangor – 21%
Pandan – 20%
Hulu Langat – 25%
Serdang – 25%
Puchong – 25%
Subang – 32%
Shah Alam – 20%
Kota Raja – 30%
Kuala Langat – 26%
Sepang – 23%
Selayang – 20%
Tebrau – 27%
Pasir Gudang – 24%
Gelang Patah – 22%