Place:Jefferson, Montana, United States

Watchers
NameJefferson
Alt namesJeffersonsource: Getty Vocabulary Program
TypeCounty
Located inMontana, United States     (1865 - )
See alsoBroadwater, Montana, United StatesChild county (source: Source:Population of States and Counties of the United States: 1790-1990)
source: Getty Thesaurus of Geographic Names
source: Family History Library Catalog


the text in this section is copied from an article in Wikipedia

Jefferson County is a county in Montana, United States. As of the 2020 census, the population was 12,085. Its county seat is Boulder. The county was created in 1865 and named for President Thomas Jefferson.

Jefferson County is part of the Helena, MT Micropolitan Statistical Area.

Contents

Timeline

Date Event Source
1865 County formed Source:Red Book: American State, County, and Town Sources
1865 Court records recorded Source:Red Book: American State, County, and Town Sources
1865 Land records recorded Source:Red Book: American State, County, and Town Sources
1865 Probate records recorded Source:Red Book: American State, County, and Town Sources
1866 Marriage records recorded Source:Red Book: American State, County, and Town Sources
1870 First census Source:Population of States and Counties of the United States: 1790-1990
1895 Birth records recorded Source:Red Book: American State, County, and Town Sources
1900 No significant boundary changes after this year Source:Population of States and Counties of the United States: 1790-1990

Population History

source: Source:Population of States and Counties of the United States: 1790-1990
Census Year Population
1870 1,531
1880 2,464
1890 6,026
1900 5,330
1910 5,601
1920 5,203
1930 4,133
1940 4,664
1950 4,014
1960 4,297
1970 5,238
1980 7,029
1990 7,939

Research Tips

External links

www.rootsweb.com/~mtjerrer/


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