Lewis and Clark County, MT
Population and Components of Change
| Date |
Population |
%
Change |
Components of Change |
Total
Population
Change |
Births |
Deaths |
Inter-
national
Immigra-
tion |
Net
Domestic
Migration |
| 1970 | 33,281 | - | - |
- | - | - | - |
| 1971 | 34,400 | 3.4 | 1,119 |
- | - | - | - |
| 1972 | 35,100 | 2.0 | 700 |
- | - | - | - |
| 1973 | 36,100 | 2.8 | 1,000 |
- | - | - | - |
| 1974 | 36,600 | 1.4 | 500 |
- | - | - | - |
| 1975 | 37,300 | 1.9 | 700 |
- | - | - | - |
| 1976 | 38,500 | 3.2 | 1,200 |
- | - | - | - |
| 1977 | 40,300 | 4.7 | 1,800 |
- | - | - | - |
| 1978 | 41,700 | 3.5 | 1,400 |
- | - | - | - |
| 1979 | 42,500 | 1.9 | 800 |
- | - | - | - |
| 1980 | 43,039 | 1.3 | 539 |
- | - | - | - |
| 1981 | 44,173 | 2.6 | 1,134 |
938 | 402 | - | - |
| 1982 | 44,767 | 1.3 | 594 |
808 | 346 | - | - |
| 1983 | 45,564 | 1.8 | 797 |
816 | 360 | - | - |
| 1984 | 46,159 | 1.3 | 595 |
807 | 346 | - | - |
| 1985 | 46,912 | 1.6 | 753 |
814 | 347 | - | - |
| 1986 | 47,112 | 0.4 | 200 |
769 | 341 | - | - |
| 1987 | 47,518 | 0.9 | 406 |
722 | 344 | - | - |
| 1988 | 47,337 | -0.4 | -181 |
700 | 362 | - | - |
| 1989 | 47,322 | 0.0 | -15 |
682 | 351 | - | - |
| 1990 | 47,495 | 0.4 | 173 |
510 | 262 | - | - |
| 1991 | 48,393 | 1.9 | 898 |
834 | 499 | 26 | 428 |
| 1992 | 49,808 | 2.9 | 1,415 |
693 | 379 | 4 | 988 |
| 1993 | 51,150 | 2.7 | 1,342 |
647 | 389 | 12 | 954 |
| 1994 | 52,007 | 1.7 | 857 |
637 | 388 | 20 | 482 |
| 1995 | 53,318 | 2.5 | 1,311 |
701 | 375 | 12 | 830 |
| 1996 | 54,047 | 1.4 | 729 |
692 | 446 | 8 | 357 |
| 1997 | 54,186 | 0.3 | 139 |
634 | 429 | 9 | -194 |
| 1998 | 54,621 | 0.8 | 435 |
640 | 390 | 13 | 50 |
| 1999 | 55,214 | 1.1 | 593 |
630 | 440 | 19 | 290 |
| 2000 | 55,716 | 0.9 | 502 |
- | - | - | - |
| 2001 | 56,199 | 0.9 | 483 |
863 | 550 | 34 | 186 |
| 2002 | 56,147 | -0.1 | -52 |
654 | 478 | 18 | -206 |
| 2003 | 56,899 | 1.3 | 752 |
665 | 474 | 0 | 603 |
| 2004 | 57,751 | 1.5 | 852 |
663 | 494 | 32 | 699 |
| 2005 | 58,150 | 0.7 | 399 |
690 | 490 | 23 | 220 |
| 2006 | 59,003 | 1.5 | 853 |
723 | 475 | 29 | 600 |
| 2007 | 59,998 | 1.7 | 995 |
755 | 482 | 22 | 689 |
Note: Decade years represent April 1, Census data, not the mid-year estimates.
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