Cadiz is a city located in Harrison County Ohio. It is also the county seat of Harrison County. With a 2020 population of 3,103, it is the 327th largest city in Ohio and the 6147th largest city in the United States . Cadiz is currently declining at a rate of -0.93% annually and its population has decreased by -7.46% since the most recent census, which recorded a population of 3,353 in 2010. Cadiz reached it's highest population of in . Spanning over 9 miles, Cadiz has a population density of 353 people per square mile.
The average household income in Cadiz is $62,969 with a poverty rate of 15.47%. The median rental costs in recent years comes to $595 per month, and the median house value is $83,100. The median age in Cadiz is 42.4 years, 46 years for males, and 40.3 years for females.