Which county has the lowest median age?

Madison County, Idaho ranks #1 with 20.0 (1990 Decennial Census).

What are the top 5 counties by median age?

Madison County, Idaho, Todd County, South Dakota, Radford, Virginia, Buffalo County, South Dakota, Utah County, Utah.

How many counties are in this ranking?

3,122 counties qualify after filtering for population minimums and data availability. The ranking covers 1990 Decennial Census data.

How is median age measured?

Median age of all residents. Source: US Census Bureau, 1990 Decennial Census.

RANKING · 1990 CENSUS · 500 SHOWN OF 3,122

Youngest by median age, US counties · 1990

US counties with the youngest median age (1990 ACS).

Flip the list · Oldest by median age, US counties →

All statesAll rankings

SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS –

501Lyman County, SDSD3,69431.3–

502Conejos County, COCO7,52931.3–

503Chesapeake, VAVA255,33231.3–

504Chickasaw County, MSMS16,73031.3–

505King George County, VAVA29,64631.4–

506Fayette County, KYKY329,75131.4–

507Terry County, TXTX11,72031.4–

508Livingston County, NYNY61,43831.4–

509Shelby County, TNTN910,22631.4–

510Madison County, NYNY67,12031.4–

511Pierce County, WAWA946,28831.4–

512Kane County, UTUT8,59731.4–

513Miami County, ININ34,48731.4–

514Outagamie County, WIWI195,89431.4–

515Tom Green County, TXTX120,60231.4–

516Albemarle County, VAVA118,35631.4–

517Calumet County, WIWI53,98231.4–

518Harnett County, NCNC150,13731.4–

519Rapides Parish, LALA125,87731.4–

520Gadsden County, FLFL44,29831.4–

521Lewis County, NYNY26,47931.4–

522Decatur County, GAGA29,43231.4–

523Garfield County, UTUT5,25631.5–

524Delaware County, ININ113,10631.5–

525Anderson County, TXTX59,80531.5–

526Minnehaha County, SDSD212,69131.5–

527Pendleton County, KYKY14,80031.5–

528Atkinson County, GAGA8,45431.5–

529Wake County, NCNC1,257,23531.5–

530Warren County, KYKY149,37531.5–

531Saguache County, COCO6,73231.5–

532Elliott County, KYKY7,26531.5–

533Winneshiek County, IAIA19,73331.5–

534DeSoto County, MSMS197,91831.5–

535Winkler County, TXTX7,54031.5–

536Brown County, WIWI275,80331.5–

537Jefferson County, GAGA15,01131.5–

538Potter County, TXTX114,45331.5–

539Canyon County, IDID275,12331.5–

540Orange County, CACA3,149,50731.5–

541Scotland County, NCNC33,32231.5–

542Boone County, KYKY145,31631.5–

543Butler County, OHOH400,12831.5–

544Lyon County, MNMN25,68431.5–

545Worth County, GAGA20,05931.6–

546Okaloosa County, FLFL221,81031.6–

547Monroe County, ALAL18,96531.6–

548Nelson County, KYKY49,03631.6–

549Grant County, WIWI52,44631.6–

550Valencia County, NMNM82,01331.6–

551Hampton County, SCSC18,17431.6–

552Ketchikan Gateway, AKAK13,54931.6–

553Boulder County, COCO328,56031.6–

554Addison County, VTVT38,04831.6–

555Shelby County, ALAL238,55231.6–

556Yakima County, WAWA259,18531.6–

557Barnwell County, SCSC20,65331.6–

558Scott County, MSMS28,07331.6–

559Bartow County, GAGA120,80031.6–

560Orange County, FLFL1,528,00231.6–

561Vermilion Parish, LALA57,67131.6–

562Duval County, FLFL1,062,96331.6–

563Washington County, MNMN286,89531.6–

564Craighead County, ARAR116,95731.6–

565Blaine County, MTMT6,86031.6–

566Pershing County, NVNV6,42131.6–

567Turner County, GAGA8,98331.6–

568Desha County, ARAR9,98431.7–

569Greene County, ALAL7,06731.7–

570Loudoun County, VAVA449,74931.7–

571Riverside County, CACA2,544,91631.7–

572Calcasieu Parish, LALA208,46631.7–

573Walton County, GAGA112,69631.7–

574Crawford County, GAGA12,20631.7–

575Missoula County, MTMT123,51331.7–

576Pointe Coupee Parish, LALA19,52031.7–

577Union County, FLFL16,25031.7–

578Jefferson Davis Parish, LALA31,47131.7–

579Perry County, KYKY26,55531.7–

580Dodge County, MNMN21,37631.7–

581Baker County, GAGA2,72531.7–

582Lake County, ILIL719,33931.7–

583Olmsted County, MNMN166,73131.7–

584Shelby County, OHOH48,06531.7–

585Hardin County, OHOH30,07231.7–

586Haakon County, SDSD1,80231.7–

587Red River Parish, LALA7,16531.7–

588Lapeer County, MIMI89,51631.7–

589Matagorda County, TXTX36,46331.7–

590Jefferson County, OROR25,74031.7–

591St. Croix County, WIWI98,27631.7–

592Drew County, ARAR17,05431.7–

593Orleans Parish, LALA362,15431.7–

594Wichita County, TXTX129,55531.8–

595Scott County, TNTN22,67131.8–

596Bacon County, GAGA11,07031.8–

597Jackson County, MSMS147,66631.8–

598Breathitt County, KYKY12,55831.8–

599Scurry County, TXTX16,16231.8–

600Wilkinson County, MSMS7,58231.8–

601Noble County, ININ47,93731.8–

602Ochiltree County, TXTX9,28431.8–

603Santa Barbara County, CACA442,06531.8–

604Beauregard Parish, LALA36,67331.8–

605Cobb County, GAGA793,34531.8–

606Greenlee County, AZAZ9,31231.8–

607Kenton County, KYKY175,77931.8–

608Clinch County, GAGA6,84731.8–

609Lincoln County, MOMO66,67631.8–

610Baldwin County, GAGA44,02931.8–

611Montgomery County, ALAL225,89131.8–

612Wyandotte County, KSKS170,59731.8–

613Kitsap County, WAWA283,37431.8–

614Clarke County, ALAL22,01431.8–

615Stark County, NDND34,01331.8–

616Meriwether County, GAGA21,51631.8–

617Chaves County, NMNM63,36431.8–

618Ventura County, CACA830,85131.8–

619Durham County, NCNC347,24031.8–

620Victoria County, TXTX92,65631.8–

621Moffat County, COCO13,12231.8–

622La Plata County, COCO56,89831.8–

623Lee County, ARAR8,02931.8–

624Converse County, WYWY13,82431.9–

625Mercer County, OHOH42,73731.9–

626Houghton County, MIMI37,84231.9–

627Sedgwick County, KSKS538,43331.9–

628Douglas County, NENE606,46031.9–

629Beaverhead County, MTMT10,04331.9–

630Franklin County, VTVT51,17731.9–

631Scott County, KYKY62,26231.9–

632Effingham County, ILIL34,51931.9–

633Phelps County, MOMO45,24731.9–

634Allegan County, MIMI123,18831.9–

635Autauga County, ALAL61,92031.9–

636Wayne County, NCNC122,27831.9–

637Henry County, GAGA264,92231.9–

638Dawson County, GAGA35,36531.9–

639Bibb County, ALAL22,26231.9–

640Marion County, ININ992,19631.9–

641Portsmouth, VAVA96,77731.9–

642Indiana County, PAPA82,87831.9–

643Elkhart County, ININ208,77431.9–

644Ada County, IDID546,14131.9–

645Adair County, OKOK19,82831.9–

646Cherokee County, OKOK49,19631.9–

647Edwards County, TXTX1,37031.9–

648Laramie County, WYWY102,93831.9–

649Washington County, MOMO23,81031.9–

650Lassen County, CACA28,11731.9–

651Cheyenne County, COCO1,71331.9–

652DeKalb County, ININ44,53531.9–

653Evans County, GAGA11,02831.9–

654Sacramento County, CACA1,618,46032.0–

655Grant Parish, LALA22,07532.0–

656Mobile County, ALAL411,65832.0–

657Presidio County, TXTX5,43332.0–

658Beaver County, UTUT7,30132.0–

659Burleigh County, NDND103,25132.0–

660Union County, NCNC267,67432.0–

661Grant County, WAWA105,72732.0–

662Lafayette County, FLFL8,79232.0–

663Madison County, ALAL433,51632.0–

664Wilson County, TXTX56,13932.0–

665Washington County, GAGA19,45332.0–

666Pope County, ARAR64,97632.0–

667Jasper County, MSMS15,78532.0–

668Isanti County, MNMN44,38632.0–

669DeKalb County, GAGA774,39432.0–

670Jefferson County, ARAR62,98732.0–

671Chesterfield County, VAVA397,14832.0–

672Coweta County, GAGA160,24032.0–

673Hale County, ALAL15,19432.0–

674Lamoille County, VTVT26,29432.0–

675Orange County, NYNY417,66932.0–

676Hill County, MTMT16,16732.0–

677Benton County, MSMS7,50232.0–

678Paulding County, OHOH18,72732.0–

679Santa Clara County, CACA1,914,39132.0–

680Dubois County, ININ44,01632.0–

681Juneau, AKAK31,60932.1–

682Lee County, MSMS83,73132.1–

683Mecklenburg County, NCNC1,233,38332.1–

684Madera County, CACA167,92732.1–

685Clay County, FLFL239,59332.1–

686Fulton County, GAGA1,098,79132.1–

687Johnson County, TXTX218,04832.1–

688Bullock County, ALAL9,78032.1–

689Platte County, NENE35,64932.1–

690Hancock County, KYKY9,05032.1–

691Grant County, KYKY26,18132.1–

692Jasper County, ININ33,89432.1–

693Spalding County, GAGA70,77532.1–

694Genesee County, MIMI401,09332.1–

695Ramsey County, MNMN541,62332.1–

696Cheatham County, TNTN42,77832.1–

697Butts County, GAGA27,21832.1–

698Allen County, ININ402,32932.1–

699Benton County, WAWA221,72232.1–

700Kosciusko County, ININ80,89232.1–

701Florence County, SCSC138,50432.1–

702Maricopa County, AZAZ4,689,55832.1–

703Lauderdale County, MSMS70,31732.1–

704Marlboro County, SCSC25,48832.2–

705Canadian County, OKOK187,18932.2–

706Marion County, MSMS24,00132.2–

707Jeff Davis County, GAGA15,21932.2–

708Montgomery County, TXTX781,19432.2–

709Kendall County, ILIL145,47032.2–

710Rockdale County, GAGA98,41632.2–

711Harford County, MDMD266,44632.2–

712Chippewa County, MIMI36,08132.2–

713Wayne County, OHOH116,75832.2–

714Floyd County, KYKY34,40132.2–

715Putnam County, ININ37,87632.2–

716Chatham County, GAGA311,85532.2–

717Lincoln County, ARAR12,76432.2–

718Putnam County, TNTN86,61232.2–

719Buchanan County, VAVA18,49232.2–

720St. Clair County, ILIL250,70832.2–

721Kenedy County, TXTX31932.2–

722Chisago County, MNMN59,14232.2–

723Toombs County, GAGA27,54532.2–

724Colusa County, CACA21,83632.2–

725Lawrence County, ALAL33,84332.2–

726Prowers County, COCO11,88432.2–

727Snohomish County, WAWA870,65632.2–

728Gray County, KSKS5,65232.2–

729Randolph County, GAGA6,15632.2–

730Cape Girardeau County, MOMO83,99932.2–

731Marion County, SCSC28,24232.2–

732Huron County, OHOH58,25032.2–

733Greene County, VAVA21,95832.2–

734Jones County, GAGA29,17132.2–

735Hall County, GAGA226,56832.2–

736Knox County, KYKY29,53232.2–

737Hillsborough County, NHNH433,41532.2–

738Richland Parish, LALA19,58232.3–

739Brooks County, GAGA16,10132.3–

740Honolulu County, HIHI988,70332.3–

741Del Norte County, CACA26,41032.3–

742Clarion County, PAPA36,68032.3–

743York County, SCSC306,88732.3–

744Fayette County, TNTN45,07132.3–

745Marion County, KYKY20,11532.3–

746Dooly County, GAGA11,15632.3–

747Pasquotank County, NCNC42,20132.3–

748Chicot County, ARAR9,10732.3–

749Richland County, NDND16,73132.3–

750Island County, WAWA85,65732.3–

751De Soto Parish, LALA27,38132.3–

752Monroe County, MIMI156,00432.3–

753Douglas County, COCO399,39632.3–

754Montcalm County, MIMI69,40632.3–

755Cass County, MOMO115,85932.3–

756Morehouse Parish, LALA23,70532.3–

757Osage County, MOMO13,61132.3–

758Ben Hill County, GAGA17,09932.3–

759McDuffie County, GAGA21,64032.3–

760Mono County, CACA12,50532.3–

761Franklin County, MOMO108,09032.3–

762Frederick County, MDMD302,88332.3–

763Catahoula Parish, LALA8,22332.3–

764Grafton County, NHNH93,22532.3–

765Howard County, MDMD339,18332.3–

766Mercer County, NDND8,44132.4–

767Milwaukee County, WIWI924,21632.4–

768Jefferson Parish, LALA431,39832.4–

769Fairfield County, SCSC20,34032.4–

770Daggett County, UTUT93432.4–

771Logan County, OKOK55,47332.4–

772Liberty County, FLFL8,03532.4–

773Sutton County, TXTX3,20332.4–

774Bernalillo County, NMNM667,60132.4–

775McHenry County, ILIL317,75132.4–

776Concordia Parish, LALA17,83632.4–

777Franklin Parish, LALA19,00232.4–

778Whitley County, KYKY37,29732.4–

779Clinton County, MIMI80,43232.4–

780Campbell County, KYKY95,44132.4–

781Marion County, GAGA7,67632.4–

782Wyoming County, NYNY39,74132.4–

783Randall County, TXTX152,35132.4–

784Kemper County, MSMS8,60032.4–

785Emanuel County, GAGA23,14732.4–

786Santa Rosa County, FLFL211,11532.4–

787DuPage County, ILIL934,29832.4–

788Pike County, MSMS38,71232.4–

789Pike County, KYKY54,72132.4–

790Crosby County, TXTX4,85232.4–

791Simpson County, MSMS25,49832.4–

792Madison County, NENE36,10632.4–

793Heard County, GAGA12,14932.4–

794Scott County, IAIA175,25932.4–

795Washington County, WIWI139,23832.4–

796Cross County, ARAR16,18632.4–

797Shiawassee County, MIMI67,68132.4–

798Greene County, OHOH174,32232.4–

799St. Tammany Parish, LALA279,10832.4–

800Rio Blanco County, COCO6,68332.4–

801Harding County, SDSD1,33132.4–

802Taylor County, WIWI20,11832.4–

803Madison County, OHOH46,98532.4–

804Iosco County, MIMI25,26632.4–

805Whitfield County, GAGA106,21232.4–

806Jackson County, KYKY13,32532.5–

807Polk County, IAIA516,54632.5–

808Pulaski County, ARAR404,61132.5–

809Delaware County, IAIA17,67432.5–

810Union County, PAPA42,31332.5–

811Hardee County, FLFL25,93232.5–

812Midland County, MIMI83,75432.5–

813Wolfe County, KYKY6,29832.5–

814Escambia County, FLFL333,83432.5–

815Neshoba County, MSMS28,73232.5–

816Guadalupe County, NMNM4,34332.5–

817Lawrence County, MSMS11,81932.5–

818Thomas County, KSKS7,72532.5–

819Sutter County, CACA98,78732.5–

820Glenn County, CACA28,14132.5–

821Laurel County, KYKY63,74632.5–

822King County, TXTX19232.5–

823Gloucester County, NJNJ312,63832.5–

824Dawson County, TXTX11,77632.5–

825Wayne County, MIMI1,769,03832.5–

826Warren County, MSMS41,75932.5–

827Gordon County, GAGA61,70132.5–

828Lynn County, TXTX6,01732.5–

829Lawrence County, SDSD29,45932.5–

830Schley County, GAGA4,59332.5–

831Pearl River County, MSMS59,36332.5–

832Winnebago County, WIWI174,21832.5–

833Arapahoe County, COCO673,82032.5–

834Routt County, COCO25,32932.6–

835Carbon County, WYWY14,01332.6–

836Greene County, GAGA21,36732.6–

837Oklahoma County, OKOK822,12532.6–

838Madison County, FLFL18,75932.6–

839Lucas County, OHOH423,34732.6–

840Penobscot County, MEME157,96732.6–

841St. Bernard Parish, LALA45,64232.6–

842Appling County, GAGA19,10032.6–

843Oconee County, GAGA44,89332.6–

844Pemiscot County, MOMO14,46532.6–

845Menifee County, KYKY6,43032.6–

846Letcher County, KYKY19,95232.6–

847Orleans County, NYNY39,82532.6–

848Snyder County, PAPA39,65532.6–

849Decatur County, ININ26,57632.6–

850Kings County, NYNY2,653,96332.6–

851Bleckley County, GAGA12,86632.6–

852Callaway County, MOMO45,76532.6–

853Angelina County, TXTX88,15432.6–

854Davidson County, TNTN745,90432.6–

855Seneca County, OHOH54,52232.6–

856Rockingham County, NHNH324,07732.6–

857Kenosha County, WIWI168,44832.6–

858Perry County, OHOH35,91832.6–

859Lenawee County, MIMI97,77932.6–

860Edgecombe County, NCNC49,12132.6–

861Grenada County, MSMS20,86832.6–

862Troup County, GAGA72,84432.6–

863Union County, TNTN21,45032.6–

864Morgan County, COCO30,30632.6–

865Greene County, MOMO309,28632.6–

866Miller County, ARAR42,35732.6–

867Guadalupe County, TXTX201,11132.6–

868New Castle County, DEDE588,02632.6–

869Allen Parish, LALA22,67232.7–

870Calvert County, MDMD94,48432.7–

871Lonoke County, ARAR76,66432.7–

872Johnson County, ININ174,26232.7–

873Crawford County, ARAR62,65732.7–

874Marengo County, ALAL18,31132.7–

875Chester County, TNTN17,99432.7–

876Torrance County, NMNM16,10032.7–

877Cook County, GAGA18,23232.7–

878Jerome County, IDID26,36232.7–

879Washington County, OROR611,70832.7–

880Sagadahoc County, MEME37,97932.7–

881Baltimore, MDMD569,99732.7–

882Hansford County, TXTX4,94432.7–

883McCormick County, SCSC10,21532.7–

884McIntosh County, GAGA11,98932.7–

885Christian County, MOMO96,72532.7–

886Calloway County, KYKY39,42132.7–

887Fulton County, OHOH41,85332.7–

888Dade County, GAGA16,15432.7–

889Liberty County, TXTX121,36432.7–

890Morrison County, MNMN34,62032.7–

891Defiance County, OHOH38,29232.7–

892Georgetown County, SCSC65,91232.7–

893Clark County, IDID78332.7–

894Avoyelles Parish, LALA37,94132.7–

895Berrien County, GAGA18,93232.7–

896Hillsdale County, MIMI45,73832.7–

897Colquitt County, GAGA47,43832.7–

898Boundary County, IDID13,99732.7–

899Marathon County, WIWI139,43232.7–

900Muskegon County, MIMI177,90132.7–

901Franklin County, NYNY46,50032.7–

902Caddo Parish, LALA224,22632.7–

903Forsyth County, GAGA282,80532.7–

904Tulsa County, OKOK698,78232.7–

905Aiken County, SCSC181,51532.7–

906Stanley County, SDSD3,01832.8–

907Chambers County, TXTX57,59432.8–

908Harlan County, KYKY24,72532.8–

909Warren County, OHOH257,18132.8–

910Lorain County, OHOH323,21932.8–

911Cook County, ILIL5,194,62532.8–

912Lexington County, SCSC317,58832.8–

913Scott County, ININ25,05332.8–

914Cecil County, MDMD107,13132.8–

915Morton County, KSKS2,47032.8–

916Monroe County, MSMS33,31832.8–

917Onondaga County, NYNY466,58432.8–

918Franklin County, ININ23,28632.8–

919Lauderdale County, TNTN24,61732.8–

920Jefferson County, WVWV63,10232.8–

921Saginaw County, MIMI187,68832.8–

922Cascade County, MTMT85,02932.8–

923Saratoga County, NYNY241,34332.8–

924Washington County, RIRI129,79532.8–

925Galveston County, TXTX372,20732.8–

926Hamilton County, OHOH838,41832.8–

927Porter County, ININ176,04932.8–

928Calhoun County, ALAL115,83432.8–

929Bibb County, GAGA157,55632.8–

930Hennepin County, MNMN1,284,78432.8–

931Clark County, ARAR20,93832.8–

932Pinal County, AZAZ539,38032.8–

933Box Butte County, NENE10,49432.8–

934Limestone County, ALAL122,92832.8–

935Clinton County, OHOH42,30132.8–

936Brown County, OHOH44,39732.8–

937Elmore County, ALAL91,57732.8–

938Adams County, OHOH27,86532.8–

939Pickaway County, OHOH62,97832.8–

940Auglaize County, OHOH45,90932.8–

941Clay County, WVWV7,53832.8–

942Anne Arundel County, MDMD603,38032.8–

943Webster County, MOMO43,05432.8–

944Warren County, IAIA57,33132.8–

945Yamhill County, OROR110,02432.8–

946Jefferson County, WIWI86,50532.8–

947Edgefield County, SCSC29,80832.8–

948Lancaster County, PAPA563,15932.8–

949Wharton County, TXTX42,06032.8–

950Platte County, MOMO114,40032.8–

951Gratiot County, MIMI41,19032.8–

952Cole County, MOMO77,90832.8–

953Orange County, TXTX86,26632.8–

954Morgan County, ININ74,96732.8–

955Brule County, SDSD5,27832.8–

956Camden County, NJNJ535,79932.8–

957Johnson County, GAGA9,31032.8–

958Wayne County, GAGA32,48132.8–

959Wayne County, NYNY91,25032.8–

960Racine County, WIWI198,91932.8–

961St. Joseph County, MIMI60,96832.8–

962Steele County, MNMN37,46432.8–

963Dickson County, TNTN58,66232.9–

964Eaton County, MIMI109,58132.9–

965Clinton County, ILIL37,12832.9–

966St. Joseph County, ININ272,86132.9–

967Codington County, SDSD29,56232.9–

968Clarendon County, SCSC31,04332.9–

969Fremont County, WYWY39,46432.9–

970Union County, OHOH73,44632.9–

971Stevens County, KSKS4,98432.9–

972Hamilton County, ININ387,03632.9–

973St. Louis, MOMO278,14432.9–

974Natrona County, WYWY80,52632.9–

975Tensas Parish, LALA3,70032.9–

976Cochise County, AZAZ126,33232.9–

977Alameda County, CACA1,636,63032.9–

978Clay County, MOMO265,03232.9–

979Pottawatomie County, KSKS27,18632.9–

980Garfield County, COCO63,47432.9–

981Whatcom County, WAWA236,39232.9–

982Terrell County, GAGA8,65632.9–

983Crockett County, TXTX2,76932.9–

984Jenkins County, GAGA8,84332.9–

985Vigo County, ININ106,51232.9–

986Pima County, AZAZ1,074,68532.9–

987Screven County, GAGA14,40832.9–

988Black Hawk County, IAIA131,53232.9–

989Androscoggin County, MEME116,48732.9–

990Wheeler County, NENE78932.9–

991Johnson County, KSKS636,90632.9–

992Huntington County, ININ37,22432.9–

993Barbour County, ALAL24,60732.9–

994Titus County, TXTX31,56332.9–

995Clark County, WAWA532,11932.9–

996McLeod County, MNMN36,63132.9–

997St. Clair County, MIMI160,48632.9–

998Franklin County, MEME30,82432.9–

999Choctaw County, ALAL11,90432.9–

1000Clarke County, MSMS15,10232.9–

SHOWING 501–1,000 OF 3,122

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS