Debra, Did a little searching and came up with this from the TN State Library and Archives website--now we both know the answer!--Ken DESCRIPTIONS OF CENSUS AND INDEXES 1790, 1800 and 1810: Tennessee became a state in 1796. The territorial census schedules and the 1800 census were lost or destroyed. The 1810 census of Tennessee was also lost, except for Grainger and Rutherford counties, which have been indexed. 1820: This census is incomplete and most East Tennessee counties are missing. The missing counties are marked with an * on the following list. Jackson's alphabetical state-wide index lists the heads-of-household, plus a series of numbers indicating the sex and approximate age of family members. The age categories for males, given in order, are: under 10, 10-15, 16-18, 16-25, 26-44, and over 45. To the right of the first hyphen are five similar columns for females in the following age categories: under 10, 10-15, 16-25, 26-44, and over 45. Following the second hyphen is a column detailing number of slaves in the household and a column detailing number of free blacks in the household. Another index, by Bentley, only shows the heads-of-household with a county and page number for each. ABBREVIATIONS USED FOR TENNESSEE COUNTIES 1820, 1840-1870 Each census index entry provides the county name and census page number. This list will help you identify county names which have been abbreviated by the indexer. The year the county was created is also listed. * Indicates missing from 1820 census. A Anderson 1801* B Bedford 1807 BE Benton 1835 BL Bledsoe 1807* BO Blount 1795* BR Bradley 1836 C Campbell 1806* CA Cannon 1836 CR Carroll 1821 CT Carter 1796* CE Cheatham 1856 CH Chester 1875 CL Claiborne 1801* CY Clay 1870 CO Cocke 1797* CF Coffee 1836 CC Crockett 1845 CU Cumberland 1856 D Davidson 1783 DE Decatur 1845 DK Dekalb 1837 DI Dickson 1803 DY Dyer 1823 F Fayette 1824 FE Fentress 1823 FR Franklin 1807 G Gibson 1823 GI Giles 1809 GR Grainger 1796* GE Greene 1783* GU Grundy 1844 HM Hamblen 1870 H Hamilton 1819* HA Hancock 1844 HR Hardeman 1823 HD Hardin 1819 HW Hawkins 1786* HY Haywood 1823 HE Henderson 1821 HN Henry 1821 HI Hickman 1807 HO Houston 1871 HU Humphreys 1809 J Jackson 1801 JA James 1871 JE Jefferson 1792* JO Johnson 1836 K Knox 1792* L Lauderdale 1835 LK Lake 1870 LA Lawrence 1817 LE Lewis 1843 LI Lincoln 1809 LO Loudon 1870 M Macon 1842 MA Madison 1821 MR Marion 1817* MS Marshall 1836 MU Maury 1807 MC McMinn 1819* MN McNairy 1823 ME Meigs 1836 MO Monroe 1819* MT Montgomery 1796 MOO Moore 1871 MG Morgan 1817* O Obion 1823 OV Overton 1806 P Perry 1818 PI Pickett 1879 PO Polk 1839 PU Putnam 1854 R Rhea 1807* RO Roane 1801* RB Robertson 1796 RU Rutherford 1803 S Scott 1849 SQ Sequatichie 1858 SE Sevier 1794* SH Shelby 1819 SM Smith 1799 ST Stewart 1803 SU Sullivan 1779* SN Sumner 1786 T Tipton 1823 TR Trousdale 1870 U Unicoi 1875 UN Union 1850 V VanBuren 1840 W Warren 1807 WA Washington 1777* WY Wayne 1785 WE Weakley 1823 WH White 1806 WI Williamson 1799 WL Wilson 1799