Top US Cities for Clinical Trials
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Alabama (18 cities)
Alaska (2 cities)
Arizona (21 cities)
Arkansas (10 cities)
California (162 cities)
Los Angeles(1746)San Francisco(1056)San Diego(578)Duarte(523)Palo Alto(518)La Jolla(483)Orange(435)Sacramento(428)Irvine(327)Stanford(324)Santa Monica(171)Newport Beach(165)Long Beach(161)Loma Linda(143)Beverly Hills(143)Oakland(113)Anaheim(111)Torrance(108)Fountain Valley(98)Fullerton(96)Walnut Creek(93)Glendale(90)Los Alamitos(87)Fresno(84)Pasadena(67)Bakersfield(66)Huntington Beach(65)Redwood City(63)Garden Grove(54)Chula Vista(54)Berkeley(53)Fremont(53)Lancaster(52)Northridge(50)Burbank(50)Riverside(46)Santa Rosa(44)Encino(43)Thousand Oaks(42)Arroyo Grande(42)Oceanside(39)Santa Barbara(39)Downey(36)Davis(34)La Mesa(34)Santa Ana(34)Bellflower(32)Canoga Park(32)Redlands(31)Encinitas(31)Oxnard(30)Upland(30)Dublin(29)Pomona(27)Covina(27)Culver City(27)Cerritos(27)San Jose(27)Roseville(26)Escondido(26)Whittier(26)Modesto(26)Madera(25)Coronado(23)Murrieta(23)Mountain View(22)Carmichael(22)Rancho Mirage(22)Sherman Oaks(20)Chino(20)Corona(20)Ventura(20)Tustin(19)Laguna Hills(19)Montclair(19)Clovis(19)Lemon Grove(19)West Hollywood(19)West Hills(19)West Los Angeles(18)Huntington Park(18)Carlsbad(18)Palm Springs(17)Antioch(17)Concord(17)Inglewood(17)Auburn(16)Sylmar(16)Vista(15)Vallejo(15)Napa(14)San Dimas(14)La Palma(14)Greenbrae(14)Lake Forest(14)Elk Grove(13)Granada Hills(12)Arcadia(12)Baldwin Park(12)Redding(11)San Bernardino(11)Costa Mesa(11)South Pasadena(11)Rolling Hills Estates(11)Colton(11)Imperial(11)Fontana(10)Poway(10)West Covina(10)Mission Viejo(10)San Luis Obispo(10)Santa Maria(10)Tarzana(10)Apple Valley(9)Valencia(9)Lakewood(9)Santa Clarita(9)Castro Valley(8)Stockton(8)Aliso Viejo(8)San Leandro(8)Rialto(8)Temecula(8)Sunnyvale(8)Pico Rivera(7)San Mateo(7)Burlingame(7)Merced(7)Lincoln(7)St. Helena(7)Folsom(7)Del Mar(7)Van Nuys(6)Campbell(6)Monterey(6)Ontario(6)Chico(6)Petaluma(6)Cypress(6)Novato(6)El Centro(6)Montebello(5)Victorville(5)Mission Hills(5)Cameron Park(5)El Segundo(5)Monrovia(5)Harbor City(5)Emeryville(5)Lafayette(5)North Hollywood(5)Pleasanton(5)Gardena(5)Moreno Valley(5)Laguna Niguel(5)La Habra(5)Alhambra(5)Larkspur(5)Santa Clara(5)Rancho Cucamonga(5)El Cajon(5)Lomita(5)
Colorado (21 cities)
Connecticut (26 cities)
New Haven(698)Hartford(138)Farmington(48)West Haven(40)Stamford(32)Norwalk(16)Trumbull(15)Hamden(14)Guilford(12)Storrs(12)North Haven(12)Norwich(11)Derby(10)Danbury(10)Bridgeport(10)Fairfield(9)Greenwich(9)Waterbury(8)Milford(7)West Hartford(6)Cromwell(6)Waterford(6)Westport(5)Glastonbury(5)Darien(5)Manchester(5)
Delaware (4 cities)
District of Columbia (1 city)
Florida (87 cities)
Miami(975)Tampa(694)Jacksonville(651)Orlando(442)Gainesville(403)Sarasota(124)St. Petersburg(109)Coral Gables(93)Hollywood(93)Boca Raton(92)Hialeah(87)Fort Myers(83)Miami Lakes(79)Fort Lauderdale(69)Plantation(65)Tallahassee(62)Clearwater(58)Naples(54)Miami Beach(53)Maitland(49)Weston(48)Aventura(46)Bradenton(45)West Palm Beach(44)Doral(43)Deerfield Beach(40)Tamarac(39)Margate(39)Kissimmee(38)Winter Park(36)Coral Springs(33)Pensacola(33)Brandon(30)Ocala(30)Orange City(30)Pembroke Pines(30)Lakeland(29)Daytona Beach(26)Clermont(23)Lake Mary(21)Atlantis(19)Delray Beach(17)Jupiter(17)Boynton Beach(17)Homestead(16)Miramar(15)Port Charlotte(15)DeLand(15)Altamonte Springs(14)Port Orange(14)Bay Pines(13)North Miami(13)Largo(13)Palmetto Bay(13)Gulf Breeze(12)Celebration(12)Davie(11)Port Saint Lucie(10)New Port Richey(10)Loxahatchee Groves(10)South Miami(10)Stuart(10)Cape Coral(10)Saint Augustine(10)North Miami Beach(10)Pompano Beach(9)Lady Lake(9)Fleming Island(9)Hallandale(9)Miami Gardens(9)Wellington(9)The Villages(9)Melbourne(8)Cooper City(7)Cutler Bay(7)Bonita Springs(6)Palm Beach Gardens(6)Palm Bay(6)Venice(6)Lake City(6)Inverness(6)Ocoee(6)DeBary(5)Coconut Creek(5)Gainsville(5)Panama City(5)Ormond Beach(5)
Georgia (21 cities)
Hawaii (1 city)
Illinois (42 cities)
Chicago(1451)Evanston(82)Peoria(51)Hinsdale(27)Skokie(26)Park Ridge(25)Maywood(25)Springfield(24)Urbana(23)Glenview(23)O'Fallon(18)Warrenville(14)Grayslake(14)Hines(13)Zion(12)Oak Lawn(12)Naperville(12)Orland Park(11)Rolling Meadows(11)Decatur(10)Champaign(10)Arlington Heights(9)Addison(9)Chicago Ridge(9)Niles(9)Libertyville(8)New Lenox(8)Lisle(8)Gurnee(8)Aurora(7)Danville(7)Winfield(7)Shiloh(6)DeKalb(6)Bloomington(6)Lake Forest(6)Elmhurst(6)Downers Grove(5)Rockford(5)Geneva(5)Effingham(5)Barrington(5)
Indiana (11 cities)
Kansas (10 cities)
Kentucky (7 cities)
Louisiana (11 cities)
Maine (3 cities)
Maryland (18 cities)
Massachusetts (23 cities)
Michigan (18 cities)
Minnesota (15 cities)
Mississippi (4 cities)
Missouri (12 cities)
Montana (3 cities)
Nebraska (2 cities)
Nevada (3 cities)
New Hampshire (3 cities)
New Jersey (39 cities)
Basking Ridge(245)Middletown(240)Montvale(236)Hackensack(153)New Brunswick(150)Newark(47)Camden(38)Morristown(37)West Orange(33)East Brunswick(25)Piscataway(21)Livingston(18)Marlton(17)Englewood(17)Toms River(14)Neptune City(14)Somerset(12)East Hanover(11)Voorhees Township(11)Eatontown(10)Jersey City(10)Edison(9)Hamilton(9)Summit(9)Cherry Hill(8)Teaneck(8)Florham Park(7)Somerville(7)Paramus(6)East Windsor(6)Red Bank(6)Elizabeth(6)Lakewood(6)Long Branch(6)Brick(6)Pennington(6)Plainsboro(6)Princeton(6)Sewell(5)
New Mexico (2 cities)
New York (36 cities)
New York(2171)Commack(245)Harrison(239)The Bronx(227)Buffalo(209)Rochester(179)Uniondale(152)Rockville Centre(76)Brooklyn(59)Lake Success(55)New Hyde Park(54)Stony Brook(50)Albany(47)Syracuse(46)Valhalla(37)Manhasset(35)Mineola(31)Staten Island(20)Ithaca(15)White Plains(15)Queens(13)Flushing(11)Roslyn(10)Glen Oaks(10)Westbury(10)Garden City(9)Great Neck(8)Amherst(7)Old Westbury(7)Orangeburg(7)Shirley(6)Syosset(5)Cooperstown(5)Bay Shore(5)East Syracuse(5)Richmond Hill(5)
North Carolina (24 cities)
Durham(505)Chapel Hill(344)Winston-Salem(219)Charlotte(165)Raleigh(53)Greenville(36)Huntersville(34)Wilmington(31)Asheville(18)Greensboro(17)Morrisville(17)Research Triangle Park(15)Cary(12)Fayetteville(8)Monroe(8)Morehead City(8)Kannapolis(7)Salisbury(7)Carrboro(6)Pinehurst(6)Hillsborough(6)Fort Bragg(6)Wake Forest(5)High Point(5)
North Dakota (1 city)
Ohio (14 cities)
Oklahoma (2 cities)
Pennsylvania (18 cities)
Rhode Island (2 cities)
South Carolina (8 cities)
South Dakota (2 cities)
Tennessee (8 cities)
Texas (38 cities)
Houston(1611)Dallas(601)San Antonio(388)Austin(203)Fort Worth(67)Irving(48)Galveston(46)Plano(32)El Paso(31)Lubbock(22)Tyler(21)Bellaire(20)Temple(17)Arlington(16)Richardson(16)The Woodlands(15)College Station(14)Fort Sam Houston(12)Sugar Land(12)Frisco(11)Corpus Christi(10)Webster(10)Denton(10)DeSoto(9)McAllen(8)Waco(8)Edinburg(7)McKinney(6)Allen(6)Conroe(6)Amarillo(6)Abilene(5)Humble(5)Bedford(5)Mesquite(5)Fort Hood(5)Flower Mound(5)Killeen(5)
Utah (4 cities)
Vermont (2 cities)
Virginia (10 cities)
Washington (7 cities)
West Virginia (3 cities)
Wisconsin (6 cities)
Find Clinical Trials Near You
HelloStudys tracks thousands of actively recruiting clinical trials across the United States. Whether you're looking for cancer treatment trials in Houston, diabetes studies in Los Angeles, or Alzheimer's research in Boston, our directory helps you find studies accepting patients near you.
Clinical trial participation is always free. Study-related treatments, medical tests, and doctor visits are provided at no cost, and many studies offer compensation for your time and travel.
Data updated July 22, 2026 from ClinicalTrials.gov. Browse by city above or search by condition.