Ranking of US Counties By Population in 2018

Updated on July 26, 2024.

Based on the US Census Vintage data estimates, in 2018, the Population for the United States was 326.84M. Among all US counties, Los Angeles County had the highest population (10.06M), followed by Cook County (5.17M), and Harris County (4.68M).

On the other hand, Kalawao County had the lowest population (87) followed by Loving County (149), and King County (275).

The chart below shows the top 10 counties with high population, and the table below shows the ranking of the top 200 US counties.

You can see similar ranking information for related topics. You can also see links at the bottom of the page for the ranking of counties for each state.

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Ranking of US Counties By Population in 2018
Los Angeles, CA
Cook, IL
Harris, TX
Maricopa, AZ
San Diego, CA
Orange, CA
Miami-Dade, FL
Dallas, TX
Kings, NY
Riverside, CA
Ranking of US Counties By Population in 2018
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Rank County Population
1 Los Angeles County, CA 10061533
2 Cook County, IL 5171007
3 Harris County, TX 4676913
4 Maricopa County, AZ 4405306
5 San Diego County, CA 3332483
6 Orange County, CA 3175579
7 Miami-Dade County, FL 2709711
8 Dallas County, TX 2629764
9 Kings County, NY 2580088
10 Riverside County, CA 2443221
11 Queens County, NY 2275286
12 Clark County, NV 2228970
13 King County, WA 2228488
14 San Bernardino County, CA 2165627
15 Tarrant County, TX 2080998
16 Bexar County, TX 1981061
17 Broward County, FL 1948058
18 Santa Clara County, CA 1931985
19 Wayne County, MI 1755868
20 Alameda County, CA 1666596
21 New York County, NY 1632393
22 Middlesex County, MA 1608509
23 Philadelphia County, PA 1586422
24 Sacramento County, CA 1539550
25 Palm Beach County, FL 1482833
26 Suffolk County, NY 1482275
27 Hillsborough County, FL 1455351
28 Bronx County, NY 1432316
29 Orange County, FL 1383657
30 Nassau County, NY 1357423
31 Franklin County, OH 1308599
32 Hennepin County, MN 1258021
33 Oakland County, MI 1257472
34 Travis County, TX 1246693
35 Cuyahoga County, OH 1241788
36 Allegheny County, PA 1217508
37 Contra Costa County, CA 1150840
38 Fairfax County, VA 1149688
39 Salt Lake County, UT 1148949
40 Mecklenburg County, NC 1095911
41 Wake County, NC 1092202
42 Fulton County, GA 1051516
43 Montgomery County, MD 1048794
44 Pima County, AZ 1037746
45 Collin County, TX 1006012
46 St. Louis County, MO 995900
47 Fresno County, CA 991298
48 Honolulu County, HI 981076
49 Pinellas County, FL 973343
50 Westchester County, NY 968928
51 Marion County, IN 959370
52 Duval County, FL 950469
53 Milwaukee County, WI 947908
54 Fairfield County, CT 945511
55 Shelby County, TN 937239
56 Bergen County, NJ 932897
57 Gwinnett County, GA 928072
58 DuPage County, IL 927808
59 Erie County, NY 919941
60 Prince George's County, MD 911372
61 Pierce County, WA 894951
62 Kern County, CA 893618
63 Hartford County, CT 892767
64 San Francisco County, CA 879676
65 Macomb County, MI 872089
66 Hidalgo County, TX 860765
67 Denton County, TX 858148
68 New Haven County, CT 856895
69 Ventura County, CA 847222
70 El Paso County, TX 835590
71 Worcester County, MA 828644
72 Baltimore County, MD 828547
73 Montgomery County, PA 826995
74 Middlesex County, NJ 825677
75 Hamilton County, OH 815853
76 Snohomish County, WA 814107
77 Multnomah County, OR 809448
78 Suffolk County, MA 804023
79 Essex County, NJ 800530
80 Oklahoma County, OK 790926
81 Fort Bend County, TX 789269
82 Essex County, MA 788823
83 Jefferson County, KY 768706
84 San Mateo County, CA 768410
85 Cobb County, GA 757133
86 DeKalb County, GA 755514
87 Lee County, FL 755159
88 San Joaquin County, CA 752590
89 Monroe County, NY 744239
90 Denver County, CO 716340
91 El Paso County, CO 712746
92 Polk County, FL 707095
93 Norfolk County, MA 703628
94 Jackson County, MO 701809
95 Lake County, IL 700455
96 Davidson County, TN 691298
97 Will County, IL 690934
98 Bernalillo County, NM 677929
99 Hudson County, NJ 672390
100 Jefferson County, AL 659672
101 Kent County, MI 653636
102 Arapahoe County, CO 652395
103 Tulsa County, OK 648496
104 Providence County, RI 637298
105 Bucks County, PA 628183
106 Utah County, UT 622076
107 Monmouth County, NJ 620859
108 Baltimore city, MD 603241
109 Ocean County, NJ 601649
110 Johnson County, KS 599045
111 Washington County, OR 597030
112 Brevard County, FL 594978
113 Montgomery County, TX 590127
114 Jefferson County, CO 580027
115 Anne Arundel County, MD 575641
116 Williamson County, TX 567465
117 Douglas County, NE 566523
118 Delaware County, PA 565506
119 Bristol County, MA 564780
120 New Castle County, DE 557983
121 Union County, NJ 556475
122 Ramsey County, MN 548900
123 Stanislaus County, CA 547855
124 Volusia County, FL 547117
125 Lancaster County, PA 543960
126 Dane County, WI 542448
127 Summit County, OH 541451
128 Pasco County, FL 539129
129 Guilford County, NC 533244
130 Kane County, IL 532838
131 Montgomery County, OH 531954
132 Chester County, PA 522256
133 Plymouth County, MA 518888
134 Greenville County, SC 515572
135 Sedgwick County, KS 513877
136 Spokane County, WA 513502
137 Adams County, CO 511485
138 Camden County, NJ 506685
139 Passaic County, NJ 503192
140 Sonoma County, CA 497221
141 Morris County, NJ 493084
142 Polk County, IA 486222
143 Lake County, IN 484918
144 Clark County, WA 482467
145 Richmond County, NY 476531
146 Ada County, ID 469161
147 Seminole County, FL 468195
148 Hampden County, MA 468075
149 Knox County, TN 466787
150 Prince William County, VA 466658
151 Washoe County, NV 464593
152 Tulare County, CA 464279
153 Onondaga County, NY 461890
154 Virginia Beach city, VA 450488
155 York County, PA 448417
156 Pinal County, AZ 446524
157 Solano County, CA 445931
158 Burlington County, NJ 445429
159 Santa Barbara County, CA 445137
160 East Baton Rouge Parish, LA 442720
161 Jefferson Parish, LA 434637
162 Monterey County, CA 433359
163 Lucas County, OH 429990
164 Sarasota County, FL 426890
165 Dakota County, MN 425472
166 Cameron County, TX 421446
167 Berks County, PA 420407
168 Clackamas County, OR 415586
169 Richland County, SC 415159
170 Hillsborough County, NH 414917
171 Mobile County, AL 414275
172 Charleston County, SC 406959
173 Genesee County, MI 406626
174 Loudoun County, VA 405964
175 Waukesha County, WI 402705
176 St. Charles County, MO 398656
177 Manatee County, FL 394043
178 Placer County, CA 392735
179 Pulaski County, AR 392184
180 Orleans Parish, LA 391506
181 Orange County, NY 382411
182 Butler County, OH 382114
183 Forsyth County, NC 379196
184 Lane County, OR 378807
185 Collier County, FL 378657
186 Allen County, IN 375076
187 Stark County, OH 371410
188 Washtenaw County, MI 370548
189 Brazoria County, TX 369470
190 Mercer County, NJ 368720
191 Lehigh County, PA 368452
192 Madison County, AL 367386
193 Osceola County, FL 367359
194 Hamilton County, TN 364626
195 Nueces County, TX 362177
196 Marion County, FL 359630
197 Lake County, FL 357086
198 Bell County, TX 355722
199 Anoka County, MN 354004
200 Davis County, UT 351154