Age of Housing Units

Source: American Community Survey (2009-2013), U.S. Census Bureau
Units: Percentage of all housing units, unless otherwise noted
Additional data: Download more detailed data by decade in Excel
 
Fips Area Name % Built Before 1940 MOE (+/-)
% Built Before 1940		 Median Year Built MOE (+/-)
Median Year Built
00000 United States 13.5 0.1 1976 1
19000 State of Iowa 26.9 0.2 1965 1
19001 Adair 35.9 3.8 1957 4
19003 Adams 44.3 4.3 1947 5
19005 Allamakee 32.8 2.6 1965 3
19007 Appanoose 36.1 2.7 1962 3
19009 Audubon 38.1 3.2 1951 2
19011 Benton 34.7 2.2 1962 3
19013 Black Hawk 21.8 0.9 1961 2
19015 Boone 43.0 2.4 1954 3
19017 Bremer 31.9 2.0 1961 2
19019 Buchanan 32.2 2.5 1963 3
19021 Buena Vista 32.8 2.2 1957 2
19023 Butler 42.5 2.0 1951 2
19025 Calhoun 37.0 2.7 1953 3
19027 Carroll 31.9 2.2 1960 2
19029 Cass 38.9 2.4 1955 2
19031 Cedar 35.0 2.5 1957 3
19033 Cerro Gordo 30.0 1.7 1956 1
19035 Cherokee 41.5 4.1 1951 4
19037 Chickasaw 39.9 3.0 1955 4
19039 Clarke 30.8 5.2 1967 7
19041 Clay 25.8 3.3 1961 2
19043 Clayton 42.1 2.1 1952 3
19045 Clinton 34.2 1.8 1956 1
19047 Crawford 37.4 2.7 1958 3
19049 Dallas 14.2 1.1 1995 1
19051 Davis 37.0 4.1 1964 7
19053 Decatur 37.6 3.3 1959 5
19055 Delaware 33.0 2.6 1966 3
19057 Des Moines 37.5 2.1 1955 2
19059 Dickinson 18.2 1.9 1973 2
19061 Dubuque 28.0 1.0 1966 2
19063 Emmet 35.9 3.5 1954 2
19065 Fayette 46.7 2.1 1946 4
19067 Floyd 33.7 2.8 1955 3
19069 Franklin 41.8 3.9 1949 4
19071 Fremont 37.5 2.8 1955 3
19073 Greene 41.0 3.2 1952 3
19075 Grundy 36.1 2.7 1955 2
19077 Guthrie 36.7 2.5 1961 3
19079 Hamilton 37.8 3.1 1957 3
19081 Hancock 31.1 2.9 1957 3
19083 Hardin 38.7 2.9 1952 2
19085 Harrison 43.6 2.6 1950 4
19087 Henry 30.2 2.3 1967 2
19089 Howard 42.4 3.7 1951 6
19091 Humboldt 34.9 2.9 1957 2
19093 Ida 43.0 3.1 1950 4
19095 Iowa 37.4 3.0 1962 3
19097 Jackson 34.9 2.3 1960 3
19099 Jasper 26.0 2.1 1964 2
19101 Jefferson 30.9 3.9 1965 3
19103 Johnson 11.7 0.9 1983 1
19105 Jones 32.0 2.5 1964 4
19107 Keokuk 47.1 2.8 1947 6
19109 Kossuth 36.8 2.6 1953 2
19111 Lee 37.2 2.1 1957 2
19113 Linn 15.4 0.7 1974 2
19115 Louisa 36.8 3.0 1961 4
19117 Lucas 41.2 3.2 1954 5
19119 Lyon 33.5 2.9 1960 3
19121 Madison 33.5 3.5 1972 2
19123 Mahaska 30.9 2.9 1964 3
19125 Marion 23.3 1.8 1972 2
19127 Marshall 36.5 2.0 1956 2
19129 Mills 28.0 2.7 1973 2
19131 Mitchell 38.9 3.2 1952 4
19133 Monona 44.3 3.3 1946 4
19135 Monroe 31.9 4.3 1968 6
19137 Montgomery 49.2 3.3 1942 7
19139 Muscatine 34.5 2.1 1963 3
19141 O'Brien 32.4 3.2 1956 3
19143 Osceola 37.7 4.0 1952 2
19145 Page 41.8 3.2 1949 3
19147 Palo Alto 35.0 3.3 1955 3
19149 Plymouth 28.7 2.3 1965 3
19151 Pocahontas 39.7 2.6 1950 2
19153 Polk 16.9 0.5 1974 1
19155 Pottawattamie 27.0 1.2 1963 1
19157 Poweshiek 30.5 2.5 1965 3
19159 Ringgold 34.1 3.3 1967 4
19161 Sac 42.6 2.8 1949 3
19163 Scott 15.1 0.8 1964 2
19165 Shelby 40.9 3.0 1952 3
19167 Sioux 28.0 2.2 1967 2
19169 Story 15.2 0.9 1977 1
19171 Tama 41.2 2.1 1951 3
19173 Taylor 46.1 3.3 1946 5
19175 Union 41.1 3.2 1951 4
19177 Van Buren 43.2 3.5 1954 5
19179 Wapello 35.2 1.9 1953 1
19181 Warren 15.2 1.3 1976 2
19183 Washington 35.6 2.6 1965 3
19185 Wayne 37.8 2.9 1959 5
19187 Webster 33.7 2.5 1955 2
19189 Winnebago 31.2 3.1 1962 3
19191 Winneshiek 37.5 2.6 1960 4
19193 Woodbury 33.4 1.4 1958 1
19195 Worth 46.5 3.4 1946 6
19197 Wright 39.3 3.0 1953 3
 
Notes:
  • Median year built describes the midpoint of the age distribution.  Half of all housing units were built before the median year, while the other half were built later.
  • When using American Community Survey (ACS) data, users should note the margin of error (MOE) associated with each estimate.  Adding and subtracting the MOE from the published estimate provides a 90 percent confidence interval for the true value in the region of interest.
  • Estimates from the ACS reflect average values for the given measure over a five-year sampling period.
  • Latest Census Bureau release:   December 2014