Karachi: In the 1985 non-party-based general elections for the Sindh Provincial Assembly, the voter turnout was recorded at 44.7%, with 3.42 million votes cast from a total of 7.65 million registered voters.

According to Free and Fair Election Network, Sindh's electorate comprises both urban areas, such as Karachi and Hyderabad, and rural regions, which include some of Pakistan's most agrarian communities. The province is noted for its economic and commercial significance, being home to Karachi, the largest city and a financial hub. The electorate in Sindh is composed of 4.33 million male voters, accounting for 56.6% of the total, and 3.32 million female voters, representing 43.4%. The data reveals a gender registration gap of 1.01 million, or 13.2%.

While gender-disaggregated polling data were not available for the 1985 elections, the report highlights that systematic recording began in 2018. The election saw 60,329 ballots rejected, accounting for 1.8% of the total votes. This rejection rate varies across elections, ranging from 0.7% in 1990 to 4.1% in 2013 and 2018, potentially influenced by changes in electoral processes and voter roll complexity.

Over the decades, Sindh's registered electorate has expanded significantly, from 5.3 million in 1970 to 27 million in 2024, a more than fivefold increase. Voter turnout has also varied, with the highest recorded in 1988 at 60.7% and the lowest in 1997 at 29%.