Which county has the lowest median year built?

San Francisco County, California ranks #1 with 1939 (1990 American Community Survey).

What are the top 5 counties by median year built?

San Francisco County, California, Taylor County, Iowa, Suffolk County, Massachusetts, Houghton County, Michigan, Keweenaw County, Michigan.

How many counties are in this ranking?

3,122 counties qualify after filtering for population minimums and data availability. The ranking covers 1990 ACS 5-year data.

How is median year built measured?

Median year that housing structures were built. Source: US Census Bureau, American Community Survey 5-year estimates (1990).

RANKING · 1990 CENSUS · 122 SHOWN OF 3,122

Oldest housing stock, US counties · 1990

US counties ranked by oldest median year of construction (2023 ACS).

Flip the list · Newest housing stock, US counties →

All statesAll rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS 2000

3001North Slope, AKAK10,5821977–

3002Yukon-Koyukuk Census Area, AKAK5,0281977–

3003Maricopa County, AZAZ4,689,5581977–

3004Christian County, MOMO96,7251977–

3005Calaveras County, CACA46,6051977–

3006Riverside County, CACA2,544,9161977–

3007Baldwin County, ALAL267,7611977–

3008Santa Rosa County, FLFL211,1151977–

3009St. Tammany Parish, LALA279,1081977–

3010Vernon Parish, LALA45,0911977–

3011Worcester County, MDMD54,4591977–

3012Camden County, MOMO44,0471977–

3013Carteret County, NCNC70,4691977–

3014Williamson County, TNTN272,0611977–

3015Bastrop County, TXTX118,9081977–

3016Hidalgo County, TXTX921,5491977–

3017San Jacinto County, TXTX29,4881977–

3018Somervell County, TXTX10,2611977–

3019Starr County, TXTX66,3191977–

3020Zapata County, TXTX13,7531977–

3021Kane County, UTUT8,5971977–

3022Gloucester County, VAVA40,0971977–

3023White County, GAGA29,8021977–

3024Dorchester County, SCSC178,3971977–

3025Rutherford County, TNTN386,3521977–

3026Bandera County, TXTX22,8761977–

3027Eagle County, COCO54,2911977–

3028Elbert County, COCO30,5341977–

3029San Miguel County, COCO7,7531977–

3030Teller County, COCO24,7561977–

3031Bay County, FLFL204,4791977–

3032Gilchrist County, FLFL20,4881977–

3033Levy County, FLFL48,5201977–

3034Nassau County, FLFL106,8791977–

3035Palm Beach County, FLFL1,575,7261977–

3036Pasco County, FLFL674,5161977–

3037Sumter County, FLFL157,7721977–

3038Wakulla County, FLFL38,0891977–

3039Long County, GAGA21,5571977–

3040Towns County, GAGA13,2851977–

3041Menominee County, WIWI4,1991977–

3042Aleutians East, AKAK3,4791978–

3043Southeast Fairbanks Census Area, AKAK7,2701978–

3044Yavapai County, AZAZ252,5521978–

3045Rockdale County, GAGA98,4161978–

3046Madison County, MSMS116,2981978–

3047St. Charles County, MOMO426,4991978–

3048Clark County, NVNV2,407,2261978–

3049Douglas County, NVNV50,1111978–

3050Elko County, NVNV54,8151978–

3051Lander County, NVNV5,8721978–

3052Chesterfield County, VAVA397,1481978–

3053Loudoun County, VAVA449,7491978–

3054Prince William County, VAVA502,9661978–

3055Stafford County, VAVA170,8031978–

3056Campbell County, WYWY48,1451978–

3057Montgomery County, TXTX781,1941978–

3058Virginia Beach, VAVA453,7371978–

3059Summit County, COCO31,5171978–

3060Highlands County, FLFL111,1221978–

3061Indian River County, FLFL172,7991978–

3062Martin County, FLFL166,2721978–

3063Okeechobee County, FLFL42,6081978–

3064Bryan County, GAGA52,0621978–

3065Douglas County, GAGA154,2931978–

3066Murray County, GAGA41,6071978–

3067Oconee County, GAGA44,8931978–

3068Union County, GAGA27,8591978–

3069Summit County, UTUT43,1411978–

3070Aleutians West Census Area, AKAK5,2401979–

3071Kenai Peninsula, AKAK61,9511979–

3072Mohave County, AZAZ228,1021979–

3073Brunswick County, NCNC174,7021979–

3074Beaufort County, SCSC204,4331979–

3075Hays County, TXTX304,3901979–

3076Cobb County, GAGA793,3451979–

3077Shelby County, ALAL238,5521979–

3078Archuleta County, COCO14,3061979–

3079Clay County, FLFL239,5931979–

3080Lee County, FLFL875,6071979–

3081Marion County, FLFL442,6601979–

3082Seminole County, FLFL491,8841979–

3083Walton County, FLFL93,2881979–

3084Forsyth County, GAGA282,8051979–

3085Lee County, GAGA34,1791979–

3086Liberty County, GAGA70,3131979–

3087Paulding County, GAGA190,9961979–

3088Howard County, MDMD339,1831979–

3089Dillingham Census Area, AKAK4,4831980–

3090St. Lucie County, FLFL402,4491980–

3091Nye County, NVNV57,3361980–

3092Horry County, SCSC427,5511980–

3093Hood County, TXTX70,5011980–

3094Rockwall County, TXTX140,7381980–

3095Fort Bend County, TXTX975,1911980–

3096Uinta County, WYWY20,7281980–

3097Charlotte County, FLFL217,2121980–

3098Citrus County, FLFL171,6661980–

3099Collier County, FLFL417,1311980–

3100St. Johns County, FLFL346,3281980–

3101Columbia County, GAGA169,1891980–

3102Dawson County, GAGA35,3651980–

3103Lake and Peninsula, AKAK1,3571981–

3104Matanuska-Susitna, AKAK118,6661981–

3105Dare County, NCNC38,2451981–

3106Denton County, TXTX1,069,3461981–

3107Washington County, UTUT213,6701981–

3108James City County, VAVA83,3261981–

3109Spotsylvania County, VAVA155,3881981–

3110Williamson County, TXTX752,8271981–

3111Sandoval County, NMNM159,5651981–

3112Cherokee County, GAGA299,2731981–

3113Henry County, GAGA264,9221981–

3114Collin County, TXTX1,297,1791981–

3115Manassas, VAVA44,3321981–

3116Hernando County, FLFL221,7011982–

3117Osceola County, FLFL481,7181982–

3118Gwinnett County, GAGA1,018,0991982–

3119Douglas County, COCO399,3961983–

3120Flagler County, FLFL140,3601983–

3121Camden County, GAGA60,1431983–

3122Fayette County, GAGA125,1561983–

SHOWING 3,001–3,122 OF 3,122

1 2 3 4 5 6 7

Download CSV (full list, 3,122 rows)

UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES