Table 1.  The Most Populous Counties and Incorporated Places in 2010 in Montana:  2000 and 2010
(For information on confidentiality protection, nonsampling error, and definitions, see http://www.census.gov/prod/cen2010/pl94-171.pdf)
Population rank				Population		Change, 2000 to 2010
2010	2000		Geographic area	2000 1	2010	Number	Percent
			Montana………...……………………………………………….	902 195	989 415	87 220	9.7
			COUNTY
1	1		Yellowstone County…………………………………………….	129 352	147 972	18 620	14.4
2	2		Missoula County……………………………………………..	95 802	109 299	13 497	14.1
3	4		Flathead County……………………………………………….	74 471	90 928	16 457	22.1
4	5		Gallatin County……………………………………………….	67 831	89 513	21 682	32.0
5	3		Cascade County………………………………………………	80 357	81 327	970	1.2
6	6		Lewis and Clark County…………………………………………..	55 716	63 395	7 679	13.8
7	7		Ravalli County……………………………………………….	36 070	40 212	4 142	11.5
8	8		Silver Bow County 2………………………………………………….	34 606	34 200	-  406	-1.2
9	9		Lake County…………………………………………………..	26 507	28 746	2 239	8.4
10	10		Lincoln County………………………………………………..	18 837	19 687	850	4.5
11	11		Hill County………………………………………………….	16 673	16 096	-  577	-3.5
12	12		Park County…………………………………………………..	15 694	15 636	-  58	-0.4
13	13		Glacier County……………………………………………….	13 247	13 399	152	1.1
14	14		Big Horn County………………………………………………	12 671	12 865	194	1.5
15	16		Custer County………………………………………………..	11 696	11 699	3	-
16	15		Fergus County………………………………………………..	11 893	11 586	-  307	-2.6
17	18		Sanders County………………………………………………	10 227	11 413	1 186	11.6
18	19		Jefferson County………………………………………………..	10 049	11 406	1 357	13.5
19	17		Roosevelt County………………………………………………..	10 620	10 425	-  195	-1.8
20	21		Carbon County………………………………………………….	9 552	10 078	526	5.5
			INCORPORATED PLACE
1	1		Billings city……………………………………………………	89 847	104 170	14 323	15.9
2	2		Missoula city…………………………………………………..	57 053	66 788	9 735	17.1
3	3		Great Falls city………………………………………………..	56 690	58 505	1 815	3.2
4	5		Bozeman city………………………………………………….	27 509	37 280	9 771	35.5
5	4		Butte-Silver Bow 2…………………………………………………….	34 606	34 200	-  406	-1.2
6	6		Helena city…………………………………………………….	25 780	28 190	2 410	9.3
7	7		Kalispell city……………………………………………………	14 223	19 927	5 704	40.1
8	8		Havre city………………………………………………………	9 621	9 310	-  311	-3.2
9	9		Anaconda-Deer Lodge County………………………………………	9 417	9 298	-  119	-1.3
10	10		Miles City city……………………………………………………	8 487	8 410	-  77	-0.9
11	14		Belgrade city…………………………………………………..	5 728	7 389	1 661	29.0
12	11		Livingston city…………………………………………………….	6 851	7 044	193	2.8
13	12		Laurel city……………………………………………………….	6 255	6 718	463	7.4
14	15		Whitefish city……………………………………………………	5 032	6 357	1 325	26.3
15	13		Lewistown city………………………………………………….	5 813	5 901	88	1.5
16	16		Sidney city…………………………………………………….	4 774	5 191	417	8.7
17	17		Glendive city……………………………………………………..	4 729	4 935	206	4.4
18	21		Columbia Falls city…………………………………………….	3 645	4 688	1 043	28.6
19	18		Polson city…………………………………………………	4 041	4 488	447	11.1
20	20		Hamilton city……………………………………………………	3 705	4 348	643	17.4
-  Represents zero or rounds to 0.0.
1 Census 2000 counts are as published in Census 2000 reports and thus do not include any changes published subsequently due to boundary changes or to the Count Question Resolution program.
2 Silver Bow County and the incorporated place of Butte-Silver Bow are coextensive.
Source:  U.S. Census Bureau, Census 2000 Redistricting Data (Public Law 94-171) Summary File, Table PL1, and 2010 Census Redistricting Data (Public Law 94-171) Summary File, Table P1.