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Political centralization index in Iran

Iran: Political centralization index was 0.834 in 2025. ▼ Falling

Latest (2025)
0.834
Change on year
unchanged
World rank
29th
of 176 countries
All-time high
0.974
in 1900
All-time low
0.684
in 1979
Years of data
126
1900–2025

Political centralization index in Iran, 1900–2025

00.20.40.60.81190019622025

Source: Our World in Data.

Analysis

In 2025, political centralization index in Iran stood at 0.834.

Compared with earlier readings it is up 11.5% over ten years.

Over the whole period, political centralization index in Iran peaked at 0.974 in 1900 and was at its lowest, 0.684, in 1979.

That places Iran 29th out of 176 countries with data for 2025, putting it in the top quarter.

The long-run direction has been consistently falling across the 126 years of available data.

Political centralization index in Iran, year by year

Year Value Change
1900 0.974 —
1901 0.974 +0.0%
1902 0.974 +0.0%
1903 0.974 +0.0%
1904 0.974 +0.0%
1905 0.974 +0.0%
1906 0.907 -6.9%
1907 0.851 -6.2%
1908 0.863 +1.4%
1909 0.871 +0.9%
1910 0.875 +0.5%
1911 0.88 +0.6%
1912 0.936 +6.4%
1913 0.936 +0.0%
1914 0.931 -0.5%
1915 0.874 -6.1%
1916 0.931 +6.5%
1917 0.931 +0.0%
1918 0.931 +0.0%
1919 0.931 +0.0%
1920 0.931 +0.0%
1921 0.933 +0.2%
1922 0.879 -5.8%
1923 0.87 -1.0%
1924 0.87 +0.0%
1925 0.885 +1.7%
1926 0.891 +0.7%
1927 0.903 +1.3%
1928 0.917 +1.6%
1929 0.917 +0.0%
1930 0.917 +0.0%
1931 0.917 +0.0%
1932 0.917 +0.0%
1933 0.917 +0.0%
1934 0.886 -3.4%
1935 0.886 +0.0%
1936 0.886 +0.0%
1937 0.886 +0.0%
1938 0.886 +0.0%
1939 0.886 +0.0%
1940 0.886 +0.0%
1941 0.894 +0.9%
1942 0.825 -7.7%
1943 0.825 +0.0%
1944 0.8 -3.0%
1945 0.799 -0.1%
1946 0.799 +0.0%
1947 0.799 +0.0%
1948 0.799 +0.0%
1949 0.799 +0.0%
1950 0.753 -5.8%
1951 0.753 +0.0%
1952 0.753 +0.0%
1953 0.734 -2.5%
1954 0.818 +11.4%
1955 0.808 -1.2%
1956 0.808 +0.0%
1957 0.808 +0.0%
1958 0.808 +0.0%
1959 0.808 +0.0%
1960 0.808 +0.0%
1961 0.808 +0.0%
1962 0.808 +0.0%
1963 0.806 -0.2%
1964 0.803 -0.4%
1965 0.803 +0.0%
1966 0.803 +0.0%
1967 0.803 +0.0%
1968 0.803 +0.0%
1969 0.803 +0.0%
1970 0.803 +0.0%
1971 0.803 +0.0%
1972 0.803 +0.0%
1973 0.803 +0.0%
1974 0.803 +0.0%
1975 0.803 +0.0%
1976 0.803 +0.0%
1977 0.803 +0.0%
1978 0.803 +0.0%
1979 0.684 -14.8%
1980 0.791 +15.6%
1981 0.707 -10.6%
1982 0.707 +0.0%
1983 0.777 +9.9%
1984 0.779 +0.3%
1985 0.779 +0.0%
1986 0.785 +0.8%
1987 0.785 +0.0%
1988 0.785 +0.0%
1989 0.785 +0.0%
1990 0.793 +1.0%
1991 0.793 +0.0%
1992 0.793 +0.0%
1993 0.791 -0.3%
1994 0.791 +0.0%
1995 0.791 +0.0%
1996 0.791 +0.0%
1997 0.792 +0.1%
1998 0.75 -5.3%
1999 0.75 +0.0%
2000 0.75 +0.0%
2001 0.759 +1.2%
2002 0.772 +1.7%
2003 0.772 +0.0%
2004 0.772 +0.0%
2005 0.783 +1.4%
2006 0.777 -0.8%
2007 0.777 +0.0%
2008 0.777 +0.0%
2009 0.792 +1.9%
2010 0.785 -0.9%
2011 0.785 +0.0%
2012 0.785 +0.0%
2013 0.748 -4.7%
2014 0.748 +0.0%
2015 0.748 +0.0%
2016 0.735 -1.7%
2017 0.757 +3.0%
2018 0.76 +0.4%
2019 0.777 +2.2%
2020 0.789 +1.5%
2021 0.79 +0.1%
2022 0.826 +4.6%
2023 0.833 +0.8%
2024 0.834 +0.1%
2025 0.834 +0.0%

Iran compared with similar countries

  • Iran's 0.834 is above the median for upper middle income countries, which is 0.3495, 2.4× the median. (48 countries reporting)
  • Iran's 0.834 is above the median for Middle East, North Africa, Afghanistan & Pakistan, which is 0.597, 1.4× the median. (23 countries reporting)

Averages by decade

DecadeAverage LowestHighest Years
1900s 0.9336 0.851 0.974 10
1910s 0.9156 0.874 0.936 10
1920s 0.8996 0.87 0.933 10
1930s 0.8984 0.886 0.917 10
1940s 0.8225 0.799 0.894 10
1950s 0.7851 0.734 0.818 10
1960s 0.8048 0.803 0.808 10
1970s 0.7911 0.684 0.803 10
1980s 0.768 0.707 0.791 10
1990s 0.7835 0.75 0.793 10
2000s 0.7731 0.75 0.792 10
2010s 0.7628 0.735 0.785 10
2020s 0.8177 0.789 0.834 6

Countries ranked near Iran

  1. 26 South Sudan 0.847 compare
  2. 27 Guinea-Bissau 0.843 compare
  3. 28 United Arab Emirates 0.837 compare
  4. 29 Kazakhstan 0.834 compare
  5. 31 Mauritania 0.826 compare
  6. 32 Haiti 0.809 compare

See the full ranking of 176 places →

More reference data data for Iran

All data for Iran →

Frequently asked questions

What is political centralization index in Iran?
Political centralization index in Iran was 0.834 in 2025, according to Our World in Data.
What is the highest political centralization index recorded in Iran?
The highest recorded value was 0.974 in 1900.
What is the lowest political centralization index recorded in Iran?
The lowest recorded value was 0.684 in 1979.
How does Iran rank for political centralization index?
Iran ranks 29th out of 176 countries with data for 2025.
Is political centralization index rising or falling in Iran?
Over the last ten years it is up 11.5%. The long-run trend across the full record is falling.
Where does this Iran data come from?
The figures come from Our World in Data, published as part of Political centralization index. Statizoid updates them automatically from the source API.

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Relationships involving this indicator

Comparisons with other indicators across countries. Each was re-measured with population and national income held constant, so a relationship that only reflected country size is not listed here.

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Political centralization index in Iran. Statizoid, drawing on Our World in Data. Retrieved 14 November 2026, from https://reference.statizoid.com/stat/political-centralization-index/iran-islamic-rep/

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About this data

Indicator
Political centralization index
Source
Our World in Data
Licence
CC BY 4.0 (Our World in Data)
Coverage
176 places, 29,802 data points, 1789–2025
Last refreshed