Top US Cities for Clinical Trials
Browse All Cities by State
Alabama (17 cities)
Alaska (2 cities)
Arizona (21 cities)
Arkansas (11 cities)
California (158 cities)
Los Angeles(1737)San Francisco(1055)San Diego(581)Duarte(546)Palo Alto(516)La Jolla(483)Orange(440)Sacramento(438)Irvine(338)Stanford(327)Long Beach(167)Santa Monica(160)Newport Beach(159)Beverly Hills(150)Loma Linda(140)Oakland(119)Anaheim(117)Torrance(111)Walnut Creek(100)Fountain Valley(92)Fullerton(92)Glendale(90)Los Alamitos(86)Fresno(82)Huntington Beach(67)Pasadena(66)Bakersfield(63)Lancaster(60)Redwood City(60)Chula Vista(57)Garden Grove(53)Fremont(51)Berkeley(50)Burbank(49)Riverside(48)Northridge(45)Thousand Oaks(44)Santa Rosa(43)Santa Barbara(41)Oceanside(39)Encino(38)La Mesa(37)Santa Ana(36)Downey(36)Arroyo Grande(35)Bellflower(33)Davis(33)Encinitas(32)Oxnard(31)Canoga Park(31)Covina(29)Redlands(29)Upland(28)Escondido(28)Culver City(28)Madera(27)Modesto(27)Dublin(27)Cerritos(26)Pomona(26)San Jose(25)Whittier(25)Roseville(25)Murrieta(24)Coronado(24)Rancho Mirage(23)West Los Angeles(22)Tustin(21)Sherman Oaks(21)West Hills(21)Clovis(20)Mountain View(20)Corona(20)Chino(20)Laguna Hills(19)Palm Springs(18)Carmichael(18)West Hollywood(18)Montclair(17)Sylmar(17)Concord(17)Lemon Grove(16)Greenbrae(16)Lake Forest(16)Huntington Park(16)Auburn(16)Carlsbad(15)Antioch(15)Vallejo(15)Ventura(15)Inglewood(15)Redding(14)La Palma(14)Arcadia(13)Tarzana(13)Costa Mesa(13)Vista(12)Colton(12)Imperial(12)South Pasadena(12)San Dimas(12)Baldwin Park(11)Fontana(11)Napa(11)Rolling Hills Estates(11)Valencia(11)Elk Grove(11)Lincoln(10)Santa Clarita(10)Poway(10)West Covina(10)Granada Hills(10)Mission Viejo(10)Santa Maria(9)Apple Valley(9)Stockton(9)Rialto(9)Temecula(8)Aliso Viejo(8)Folsom(8)San Bernardino(8)Lakewood(8)San Leandro(8)Burlingame(7)Pico Rivera(7)Sunnyvale(7)Gardena(7)Van Nuys(7)San Luis Obispo(7)St. Helena(7)Santa Clara(7)Castro Valley(7)Pleasanton(7)Harbor City(6)Ontario(6)Cypress(6)Monterey(6)Moreno Valley(6)Campbell(6)Merced(6)Chico(6)Novato(6)Alhambra(6)Mission Hills(6)El Segundo(5)Menifee(5)North Hollywood(5)El Centro(5)Emeryville(5)Monrovia(5)Mather(5)Fair Oaks(5)Cameron Park(5)Petaluma(5)Lomita(5)San Carlos(5)Rancho Santa Margarita(5)Rancho Cucamonga(5)
Colorado (21 cities)
Connecticut (24 cities)
Delaware (5 cities)
District of Columbia (1 city)
Florida (89 cities)
Miami(981)Tampa(697)Jacksonville(657)Orlando(453)Gainesville(411)Sarasota(122)St. Petersburg(118)Hollywood(100)Coral Gables(95)Boca Raton(94)Fort Myers(89)Hialeah(81)Miami Lakes(78)Fort Lauderdale(71)Plantation(68)Tallahassee(58)Clearwater(57)Naples(54)Weston(53)Maitland(51)Miami Beach(50)West Palm Beach(50)Bradenton(45)Doral(44)Aventura(43)Tamarac(42)Coral Springs(39)Brandon(38)Margate(37)Kissimmee(37)Winter Park(36)Deerfield Beach(35)Pensacola(34)Orange City(32)Lakeland(28)Ocala(28)Pembroke Pines(28)Clermont(24)DeLand(23)Daytona Beach(23)Lake Mary(21)Delray Beach(20)Miramar(19)Jupiter(18)Atlantis(18)Boynton Beach(17)Altamonte Springs(16)Homestead(15)Bay Pines(14)The Villages(14)Palmetto Bay(13)Port Charlotte(13)Celebration(13)North Miami(13)Port Orange(13)Lady Lake(12)Port Saint Lucie(12)Largo(12)Gulf Breeze(12)North Miami Beach(11)Davie(11)Stuart(11)Hallandale(10)South Miami(10)Melbourne(10)Loxahatchee Groves(9)Miami Gardens(9)Cooper City(8)Saint Augustine(8)Pompano Beach(8)Cape Coral(8)Wellington(8)New Port Richey(8)Palm Bay(8)Fleming Island(8)Cutler Bay(7)Ft. Pierce(7)Palm Beach Gardens(6)Venice(6)Bonita Springs(6)Gainsville(6)Lake City(6)Ocoee(6)Crystal River(6)Panama City(5)Lakewood Rch(5)Sweetwater(5)Coconut Creek(5)Lake Worth(5)
Georgia (20 cities)
Hawaii (1 city)
Illinois (43 cities)
Chicago(1427)Evanston(82)Peoria(53)Skokie(29)Park Ridge(27)Hinsdale(26)Urbana(25)Maywood(24)Springfield(23)Glenview(22)Zion(17)O'Fallon(16)Warrenville(14)Hines(14)Naperville(13)Orland Park(13)Grayslake(12)Champaign(12)Decatur(12)Oak Lawn(11)Rolling Meadows(9)Niles(9)Libertyville(8)Danville(8)Arlington Heights(8)New Lenox(8)Chicago Ridge(8)Aurora(8)Bloomington(8)Gurnee(7)Lisle(7)Winfield(6)Downers Grove(6)Barrington(6)Addison(6)Rockford(6)DeKalb(5)Geneva(5)Lake Forest(5)Willowbrook(5)Effingham(5)Shiloh(5)Canton(5)
Indiana (13 cities)
Kansas (10 cities)
Kentucky (5 cities)
Louisiana (10 cities)
Maine (3 cities)
Maryland (18 cities)
Massachusetts (22 cities)
Michigan (22 cities)
Minnesota (14 cities)
Mississippi (4 cities)
Missouri (13 cities)
Montana (3 cities)
Nebraska (2 cities)
Nevada (3 cities)
New Hampshire (3 cities)
New Jersey (39 cities)
Basking Ridge(245)Middletown(239)Montvale(237)Hackensack(152)New Brunswick(148)Newark(47)Morristown(40)Camden(40)East Brunswick(35)West Orange(32)Piscataway(18)Livingston(16)Marlton(16)Englewood(16)East Hanover(15)Neptune City(14)Toms River(13)Somerset(11)Voorhees Township(10)Cherry Hill(10)Edison(10)Jersey City(10)Hamilton(9)Summit(8)Sewell(7)Eatontown(7)Florham Park(7)Somerville(7)Princeton(6)Paramus(6)Lakewood(6)Long Branch(6)Teaneck(6)Brick(6)Red Bank(6)East Windsor(6)Plainsboro(6)Elizabeth(6)Pennington(5)
New Mexico (2 cities)
New York (41 cities)
New York(2183)Commack(245)Harrison(232)The Bronx(223)Buffalo(210)Rochester(186)Uniondale(152)Rockville Centre(77)Brooklyn(62)Lake Success(53)Stony Brook(53)New Hyde Park(49)Albany(48)Syracuse(45)Manhasset(36)Valhalla(35)Mineola(29)Staten Island(20)White Plains(15)Ithaca(13)Queens(13)East White Plains(11)Flushing(11)Roslyn(10)Garden City(9)Westbury(9)Glen Oaks(9)Shirley(8)Great Neck(8)Amherst(7)Syosset(6)Long Island City(6)Cooperstown(6)Orangeburg(6)Binghamton(5)Richmond Hill(5)Manhattan(5)Bay Shore(5)Old Westbury(5)Jamaica(5)East Syracuse(5)
North Carolina (24 cities)
Durham(506)Chapel Hill(331)Winston-Salem(204)Charlotte(163)Raleigh(47)Huntersville(35)Wilmington(34)Greenville(33)Asheville(20)Greensboro(19)Morrisville(18)Research Triangle Park(15)Cary(13)Kannapolis(8)Fayetteville(8)Morehead City(8)High Point(7)Salisbury(7)Pinehurst(7)Hillsborough(6)Monroe(6)Carrboro(5)Fort Bragg(5)Wake Forest(5)
North Dakota (1 city)
Ohio (15 cities)
Oklahoma (2 cities)
Oregon (5 cities)
Pennsylvania (17 cities)
Rhode Island (2 cities)
South Carolina (9 cities)
South Dakota (1 city)
Tennessee (9 cities)
Texas (35 cities)
Houston(1607)Dallas(604)San Antonio(375)Austin(201)Fort Worth(68)Irving(47)Galveston(45)El Paso(33)Plano(31)Lubbock(23)Tyler(21)Bellaire(21)College Station(18)Richardson(16)The Woodlands(15)Temple(15)Frisco(13)Arlington(13)Fort Sam Houston(12)McAllen(11)Corpus Christi(11)Sugar Land(11)Webster(10)Waco(8)Conroe(7)DeSoto(7)Denton(7)Flower Mound(7)Edinburg(7)Fort Hood(6)Killeen(5)McKinney(5)Allen(5)Abilene(5)Humble(5)
Vermont (2 cities)
Virginia (10 cities)
Washington (4 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 September 5, 2026 from ClinicalTrials.gov. Browse by city above or search by condition.