Ranking of US Counties By Population in 2015

Updated on July 26, 2024.

Based on the US Census Vintage data estimates, in 2015, the Population for the United States was 320.74M. Among all US counties, Los Angeles County had the highest population (10.08M), followed by Cook County (5.24M), and Harris County (4.56M).

On the other hand, Kalawao County had the lowest population (88) followed by Loving County (119), and King County (280).

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 2015
Los Angeles, CA
Cook, IL
Harris, TX
Maricopa, AZ
San Diego, CA
Orange, CA
Miami-Dade, FL
Kings, NY
Dallas, TX
Riverside, CA
Ranking of US Counties By Population in 2015
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Rank County Population
1 Los Angeles County, CA 10077263
2 Cook County, IL 5243371
3 Harris County, TX 4556559
4 Maricopa County, AZ 4174423
5 San Diego County, CA 3280825
6 Orange County, CA 3148952
7 Miami-Dade County, FL 2659549
8 Kings County, NY 2608797
9 Dallas County, TX 2557615
10 Riverside County, CA 2344648
11 Queens County, NY 2305252
12 King County, WA 2127372
13 San Bernardino County, CA 2114352
14 Clark County, NV 2097832
15 Tarrant County, TX 1985664
16 Santa Clara County, CA 1915736
17 Bexar County, TX 1894811
18 Broward County, FL 1885435
19 Wayne County, MI 1764866
20 New York County, NY 1637327
21 Alameda County, CA 1634326
22 Middlesex County, MA 1586107
23 Philadelphia County, PA 1571679
24 Sacramento County, CA 1493547
25 Suffolk County, NY 1491997
26 Bronx County, NY 1439480
27 Palm Beach County, FL 1424772
28 Hillsborough County, FL 1364645
29 Nassau County, NY 1354987
30 Orange County, FL 1291844
31 Cuyahoga County, OH 1259109
32 Franklin County, OH 1257891
33 Oakland County, MI 1244895
34 Allegheny County, PA 1229342
35 Hennepin County, MN 1222868
36 Travis County, TX 1180003
37 Fairfax County, VA 1141040
38 Contra Costa County, CA 1124148
39 Salt Lake County, UT 1102690
40 Mecklenburg County, NC 1034049
41 Montgomery County, MD 1033370
42 Wake County, NC 1022871
43 Pima County, AZ 1009490
44 Fulton County, GA 1005752
45 St. Louis County, MO 1001585
46 Honolulu County, HI 991755
47 Westchester County, NY 968891
48 Fresno County, CA 968889
49 Milwaukee County, WI 958606
50 Pinellas County, FL 947664
51 Fairfield County, CT 945323
52 Marion County, IN 940152
53 Shelby County, TN 937598
54 DuPage County, IL 933669
55 Bergen County, NJ 926481
56 Erie County, NY 920858
57 Collin County, TX 915014
58 Duval County, FL 911106
59 Prince George's County, MD 906754
60 Hartford County, CT 896563
61 Gwinnett County, GA 888597
62 Kern County, CA 876548
63 Macomb County, MI 865031
64 San Francisco County, CA 863237
65 New Haven County, CT 860506
66 Ventura County, CA 845599
67 Pierce County, WA 844317
68 Hidalgo County, TX 838741
69 El Paso County, TX 831382
70 Baltimore County, MD 827796
71 Middlesex County, NJ 825471
72 Worcester County, MA 818446
73 Montgomery County, PA 817432
74 Hamilton County, OH 809902
75 Multnomah County, OR 790723
76 Essex County, NJ 790546
77 Suffolk County, MA 783177
78 Denton County, TX 778799
79 Oklahoma County, OK 777406
80 Essex County, MA 777228
81 Snohomish County, WA 770022
82 San Mateo County, CA 765479
83 Jefferson County, KY 765322
84 Monroe County, NY 745847
85 Cobb County, GA 739428
86 DeKalb County, GA 734846
87 San Joaquin County, CA 721919
88 Fort Bend County, TX 715260
89 Lake County, IL 704687
90 Lee County, FL 700243
91 Norfolk County, MA 694774
92 Jackson County, MO 687182
93 Will County, IL 685825
94 Denver County, CO 683328
95 Davidson County, TN 680397
96 Bernalillo County, NM 676440
97 El Paso County, CO 674094
98 Hudson County, NJ 664595
99 Jefferson County, AL 660717
100 Polk County, FL 648823
101 Tulsa County, OK 640851
102 Kent County, MI 637333
103 Providence County, RI 634146
104 Arapahoe County, CO 631688
105 Bucks County, PA 625670
106 Monmouth County, NJ 624180
107 Baltimore city, MD 622831
108 Ocean County, NJ 587238
109 Johnson County, KS 580158
110 Utah County, UT 573289
111 Washington County, OR 572955
112 Brevard County, FL 566133
113 Jefferson County, CO 565240
114 Delaware County, PA 563434
115 Anne Arundel County, MD 563133
116 Bristol County, MA 557104
117 New Castle County, DE 553929
118 Union County, NJ 549954
119 Douglas County, NE 549313
120 Summit County, OH 541940
121 Ramsey County, MN 536838
122 Lancaster County, PA 535960
123 Montgomery County, TX 535913
124 Stanislaus County, CA 532954
125 Montgomery County, OH 532059
126 Kane County, IL 528562
127 Dane County, WI 523399
128 Guilford County, NC 517281
129 Volusia County, FL 517144
130 Chester County, PA 515098
131 Sedgwick County, KS 511230
132 Plymouth County, MA 509413
133 Camden County, NJ 507760
134 Williamson County, TX 507728
135 Passaic County, NJ 504556
136 Sonoma County, CA 500598
137 Pasco County, FL 495130
138 Morris County, NJ 494370
139 Greenville County, SC 491218
140 Adams County, CO 490448
141 Spokane County, WA 488970
142 Lake County, IN 488195
143 Richmond County, NY 472301
144 Hampden County, MA 469251
145 Polk County, IA 467517
146 Onondaga County, NY 466320
147 Clark County, WA 457320
148 Tulare County, CA 456794
149 Knox County, TN 451551
150 Prince William County, VA 451242
151 Virginia Beach city, VA 450635
152 Seminole County, FL 448535
153 Burlington County, NJ 447906
154 East Baton Rouge Parish, LA 445776
155 Washoe County, NV 442617
156 Santa Barbara County, CA 442051
157 York County, PA 441911
158 Jefferson Parish, LA 435358
159 Lucas County, OH 433826
160 Solano County, CA 433378
161 Ada County, ID 433254
162 Monterey County, CA 430178
163 Cameron County, TX 419062
164 Berks County, PA 415218
165 Mobile County, AL 414654
166 Dakota County, MN 414245
167 Genesee County, MI 410574
168 Hillsborough County, NH 409229
169 Richland County, SC 406455
170 Pinal County, AZ 405922
171 Sarasota County, FL 405099
172 Clackamas County, OR 399852
173 Waukesha County, WI 396377
174 Pulaski County, AR 393857
175 Orleans Parish, LA 390094
176 Charleston County, SC 389885
177 St. Charles County, MO 385108
178 Butler County, OH 376173
179 Orange County, NY 375911
180 Stark County, OH 374798
181 Loudoun County, VA 374176
182 Placer County, CA 372870
183 Mercer County, NJ 368266
184 Forsyth County, NC 367516
185 Allen County, IN 367508
186 Washtenaw County, MI 363555
187 Manatee County, FL 362821
188 Lane County, OR 362257
189 Nueces County, TX 360587
190 Lehigh County, PA 359689
191 Westmoreland County, PA 357006
192 Collier County, FL 356288
193 Hamilton County, TN 353985
194 Madison County, AL 353194
195 Brazoria County, TX 345295
196 Anoka County, MN 344244
197 Marion County, FL 342388
198 Bell County, TX 336434
199 Chesterfield County, VA 335093
200 Davis County, UT 334814