Top US Cities for Clinical Trials
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Alabama (17 cities)
Alaska (2 cities)
Arizona (21 cities)
Arkansas (11 cities)
California (159 cities)
Los Angeles(1746)San Francisco(1061)San Diego(596)Duarte(544)Palo Alto(514)La Jolla(492)Orange(450)Sacramento(436)Irvine(364)Stanford(322)Long Beach(182)Santa Monica(161)Newport Beach(155)Beverly Hills(153)Loma Linda(144)Oakland(126)Anaheim(116)Walnut Creek(109)Torrance(106)Glendale(93)Fullerton(92)Los Alamitos(90)Fountain Valley(87)Fresno(81)Pasadena(73)Bakersfield(68)Huntington Beach(65)Redwood City(61)Lancaster(60)Fremont(57)Chula Vista(54)Berkeley(51)Burbank(49)Riverside(47)Garden Grove(45)Santa Barbara(43)La Mesa(42)Santa Rosa(41)Northridge(41)Encino(38)Downey(37)Santa Ana(37)Thousand Oaks(36)Arroyo Grande(35)Oceanside(33)Davis(32)Bellflower(31)Encinitas(31)Redlands(31)Pomona(31)Canoga Park(31)Modesto(30)Oxnard(30)Upland(29)Madera(28)Dublin(27)Cerritos(26)San Jose(26)Roseville(26)Escondido(26)Covina(25)Culver City(24)Murrieta(24)Rancho Mirage(24)West Hills(24)Whittier(24)Chino(23)Coronado(22)Lake Forest(21)Clovis(21)West Los Angeles(21)Tustin(21)Carmichael(20)Mountain View(20)Laguna Hills(20)West Hollywood(20)Corona(19)Sherman Oaks(19)Carlsbad(19)Palm Springs(18)Huntington Park(18)Vallejo(16)Antioch(16)Lemon Grove(16)Concord(16)Montclair(15)Ventura(15)San Dimas(14)Auburn(14)La Palma(14)Costa Mesa(13)Vista(13)Redding(13)Greenbrae(13)Inglewood(13)Arcadia(13)Elk Grove(12)Baldwin Park(12)Tarzana(12)Imperial(12)South Pasadena(12)Sylmar(12)Stockton(11)Rolling Hills Estates(11)Colton(11)Fontana(11)West Covina(11)Napa(11)Santa Clarita(11)Poway(10)Lincoln(10)Santa Clara(10)Mission Viejo(9)Santa Maria(9)Rialto(9)Valencia(9)Pleasanton(9)Cypress(9)Folsom(9)Gardena(9)Lakewood(8)Lomita(8)St. Helena(8)Campbell(8)San Luis Obispo(8)San Leandro(8)Burlingame(7)Aliso Viejo(7)Pico Rivera(7)Van Nuys(7)San Bernardino(7)Monterey(7)Granada Hills(7)Alhambra(7)Temecula(7)Merced(6)Petaluma(6)Castro Valley(6)North Hollywood(6)Mission Hills(6)Cameron Park(6)Apple Valley(6)Chico(6)Lynwood(6)Mather(6)Sunnyvale(6)Moreno Valley(6)Novato(6)San Marcos(5)Del Mar(5)Harbor City(5)Fair Oaks(5)San Carlos(5)Rancho Santa Margarita(5)Ontario(5)Monrovia(5)El Segundo(5)El Centro(5)Buena Park(5)
Colorado (23 cities)
Connecticut (24 cities)
Delaware (5 cities)
District of Columbia (1 city)
Florida (91 cities)
Miami(982)Tampa(698)Jacksonville(677)Orlando(463)Gainesville(405)St. Petersburg(125)Sarasota(121)Hollywood(101)Coral Gables(96)Fort Myers(90)Boca Raton(84)Miami Lakes(83)Hialeah(79)Naples(75)Fort Lauderdale(72)Plantation(68)Tallahassee(59)Weston(55)Clearwater(54)Doral(51)West Palm Beach(51)Maitland(51)Bradenton(50)Miami Beach(48)Tamarac(47)Coral Springs(46)Aventura(41)Margate(39)Brandon(37)Kissimmee(37)Winter Park(36)Pensacola(35)Deerfield Beach(35)Lakeland(30)Pembroke Pines(30)Orange City(29)Ocala(26)Clermont(25)DeLand(24)Delray Beach(22)Daytona Beach(22)Lake Mary(21)Boynton Beach(21)Altamonte Springs(18)Port Orange(18)Atlantis(17)Miramar(15)South Miami(13)Lady Lake(13)Largo(13)The Villages(13)Jupiter(13)Homestead(13)Bay Pines(13)Stuart(12)North Miami(12)Port Saint Lucie(12)Celebration(12)Melbourne(11)North Miami Beach(11)Hallandale(10)Gulf Breeze(10)New Port Richey(10)Palmetto Bay(10)Davie(9)Loxahatchee Groves(9)Port Charlotte(9)Miami Gardens(8)Fleming Island(8)Saint Augustine(8)Wellington(8)Cutler Bay(8)Gainsville(8)Bonita Springs(7)Cape Coral(7)Cooper City(7)Palm Beach Gardens(7)Palm Bay(7)Pompano Beach(7)Ft. Pierce(6)Panama City(6)Venice(6)Crystal River(6)Lakewood Rch(6)Sweetwater(6)Coconut Creek(5)Ocoee(5)Edgewater(5)Lake City(5)Riverview(5)Wesley Chapel(5)
Georgia (22 cities)
Hawaii (1 city)
Illinois (47 cities)
Chicago(1441)Evanston(78)Peoria(51)Hinsdale(28)Skokie(27)Park Ridge(26)Urbana(26)Maywood(24)Springfield(23)Zion(20)Glenview(20)O'Fallon(16)Hines(16)Champaign(13)Warrenville(13)Orland Park(13)Decatur(13)Oak Lawn(11)Bloomington(11)Naperville(11)Grayslake(11)Danville(10)Libertyville(9)Niles(9)New Lenox(9)Aurora(8)Addison(8)Canton(8)Rolling Meadows(8)Lisle(8)Chicago Ridge(8)Gurnee(7)Arlington Heights(7)Carthage(7)Downers Grove(7)Effingham(7)Barrington(6)Eureka(6)Normal(6)DeKalb(6)Geneva(6)Winfield(5)Oak Brook(5)Galesburg(5)Rockford(5)Willowbrook(5)Shiloh(5)
Indiana (12 cities)
Kansas (10 cities)
Kentucky (5 cities)
Louisiana (11 cities)
Maine (3 cities)
Maryland (16 cities)
Massachusetts (23 cities)
Michigan (22 cities)
Minnesota (16 cities)
Mississippi (4 cities)
Missouri (11 cities)
Montana (4 cities)
Nebraska (2 cities)
Nevada (3 cities)
New Hampshire (3 cities)
New Jersey (38 cities)
Basking Ridge(247)Middletown(242)Montvale(237)Hackensack(153)New Brunswick(151)Newark(48)Morristown(42)East Brunswick(40)Camden(38)West Orange(31)Piscataway(18)Livingston(17)East Hanover(16)Marlton(16)Englewood(16)Toms River(14)Neptune City(12)Somerset(12)Edison(11)Voorhees Township(11)Hamilton(10)Cherry Hill(10)Jersey City(9)Paramus(9)Eatontown(7)Somerville(7)Summit(7)Sewell(6)Elizabeth(6)Lakewood(6)Long Branch(6)Plainsboro(6)Teaneck(6)East Windsor(6)Princeton(6)Brick(5)Red Bank(5)Florham Park(5)
New Mexico (2 cities)
New York (43 cities)
New York(2187)Commack(247)Harrison(232)Buffalo(215)The Bronx(212)Rochester(184)Uniondale(154)Rockville Centre(74)Brooklyn(61)Lake Success(56)Stony Brook(53)New Hyde Park(50)Syracuse(50)Albany(47)Manhasset(40)Valhalla(34)Mineola(29)Staten Island(17)White Plains(14)Ithaca(14)Queens(13)Flushing(12)East White Plains(11)Manhattan(9)Glen Oaks(9)Roslyn(9)Garden City(8)Great Neck(8)Long Island City(7)Syosset(7)Westbury(7)Amherst(7)Potsdam(6)Orangeburg(6)Bay Shore(6)East Syracuse(6)Shirley(6)Jamaica(6)Binghamton(5)Old Westbury(5)Richmond Hill(5)Mount Kisco(5)Cooperstown(5)
North Carolina (27 cities)
Durham(521)Chapel Hill(323)Winston-Salem(203)Charlotte(171)Raleigh(48)Wilmington(36)Huntersville(34)Greenville(32)Morrisville(18)Asheville(18)Greensboro(17)Cary(14)Research Triangle Park(14)Morehead City(10)Kannapolis(8)Fayetteville(8)Pinehurst(7)Salisbury(7)Wake Forest(6)Wilson(6)Carrboro(6)High Point(6)Fort Bragg(5)Hillsborough(5)Monroe(5)Denver(5)Statesville(5)
North Dakota (1 city)
Ohio (16 cities)
Oklahoma (2 cities)
Oregon (5 cities)
Pennsylvania (16 cities)
Rhode Island (2 cities)
South Carolina (9 cities)
South Dakota (2 cities)
Tennessee (9 cities)
Texas (41 cities)
Houston(1611)Dallas(607)San Antonio(385)Austin(194)Fort Worth(78)Irving(49)Galveston(45)El Paso(36)Plano(32)Lubbock(24)Tyler(22)Bellaire(20)Richardson(17)The Woodlands(16)College Station(16)Arlington(16)Temple(14)McAllen(13)Sugar Land(13)Corpus Christi(11)Webster(11)Fort Sam Houston(11)Frisco(10)Conroe(8)Denton(7)Fort Hood(7)DeSoto(7)Waco(6)Flower Mound(6)Allen(6)Edinburg(6)Humble(6)Mesquite(5)Tomball(5)Katy(5)Abilene(5)McKinney(5)Longview(5)Bedford(5)Cypress(5)Killeen(5)
Utah (4 cities)
Vermont (1 city)
Virginia (10 cities)
Washington (5 cities)
West Virginia (3 cities)
Wisconsin (5 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 October 21, 2026 from ClinicalTrials.gov. Browse by city above or search by condition.