This category is for organizations, places or other things ended or disestablished in Alta California in the decade 1840s.
- 1790s
- 1800s
- 1810s
- 1820s
- 1830s
- 1840s
- 1850s
- 1860s
- 1870s
- 1880s
- 1890s
- 14th
- 15th
- 16th
- 17th
- 18th
- 19th
- 20th
- 21st
- 22nd
- 23rd
- 24th
See also the succeeding Category:1850s disestablishments in California