| Title | Year | Call # | Link | Location |
| Historical souvenir of Williamson County, Illinois : being a brief review of the county from date of founding to the present / compiled and edited by J. F. Wilcox. | 1905 | Q. 977.3993 W64h / online resource | Link to Catalog | Illinois History & Lincoln Coll. [non-circulating] |
| Standard atlas of Williamson county, Illinois, including a plat book of the villages, cities and townships of the county. Map of the state, United States and world. Patrons directory, reference business directory and departments devoted to general information. Analysis of the system of U.S. land surveys, digest of the system of civil government, etc., etc. Compiled by Geo. A. Ogle & co., assisted in record work and platting by T. J. Youngblood... | 1908 | F. 912.773993 OG5S | Link to Catalog | Illinois History & Lincoln Coll. [non-circulating] |
| Standard atlas of Williamson County, Illinois including a plat book of the villages, cities and townships of the county ... / compiled by G.A. Ogle & Co., Chicago, assisted by T. J. Youngblood. | 1908 | See State Library Catalog | ||
| Historical souvenir of Williamson County, Illinois : being a brief review of the county from date of founding to the present / comp. and ed. by J. F. Wilcox. | 1908 | See State Library Catalog | ||
| Williamson County, Illinois. | 193-? | G4103.W7 1930 .W2 | Link to Catalog | Illinois History & Lincoln Coll. Oversize [non-circulating] |
| Plat book of Williamson Co., Ill. | 1939? | 912.773993 H64p | Link to Catalog | Map & Geography-Oak St Facility [request only] |
| Plat book, Williamson County, Illinois / [sponsored by Bill Crews]. | 1959 | Q. 912.773993 C86P | Link to Catalog | Main Stacks |
| Tri-annual atlas & plat book, Williamson County, Illinois. / Atlas & plat book, Williamson County, Illinois. | 1964 | Q. 912.773993 R59A | Link to Catalog | Main Stacks |
| Triennial atlas & plat book, Williamson County, Illinois. / Atlas & plat book, Williamson County, Illinois. | 1968 | Q. 912.773993 R59A | Link to Catalog | Main Stacks |
| Atlas & plat book, Williamson County, Illinois. | 1972 | Q. 912.773993 R59A | Link to Catalog | Main Stacks |
| Atlas & plat book, Williamson County, Illinois. | 1975 | Q. 912.773993 R59A | Link to Catalog | Main Stacks |
| Historical souvenir of Williamson County, Illinois ... / compiled and edited by J. F. Wilcox; and Standard atlas of Williamson County, Illinois ... 1908; and, Souvenir program of the Williamson County centennial celebration ... [1939]. | 1976 | Q. 977.3993 W64h1976 | Link to Catalog | Illinois History & Lincoln Coll. [non-circulating] |
| Atlas & plat book, Williamson County, Illinois. | 1978 | Q. 912.773993 R59A | Link to Catalog | Main Stacks |
| Plat map, Williamson County, Illinois. | 1978 | G4103.W7 G4631978.R5 | Link to Catalog | Map & Geography Maps |
| Historical souvenir of Williamson County, Illinois : being a brief review of the county from date of founding to the present / compiled and edited by J. F. Wilcox. | 1979 | Q. 977.3993 W64h1979 | Link to Catalog | Main Stacks |
| Land atlas and plat book, Williamson County, Illinois / Rockford Map Publishers. | 1983 | Q. 912.773993 R59A1 | Link to Catalog | Main Stacks |
| Land atlas and plat book, Williamson County, Illinois / Rockford Map Publishers. | 1985 | Q. 912.773993 R59A1 | Link to Catalog | Main Stacks and Illinois History & Lincoln Coll. [non-circulating] |
| Land atlas and plat book, Williamson County, Illinois / Rockford Map Publishers. | 1988 | Q. 912.773993 R59A1 | Link to Catalog | Main Stacks |
| Williamson County, Illinois, land atlas & plat book / sponsored by Williamson County Farm Bureau. | 1991 | See State Library Catalog | ||
| Land atlas and plat book, Williamson County, Illinois / Rockford Map Publishers. | 1995 | Q. 912.773993 R59A1 | Link to Catalog | Main Stacks and Map & Geography Reserves |
| Land atlas & plat book, Williamson County, Illinois. | 2000 | See State Library Catalog | ||
| Williamson County, IL, land atlas & plat book / Cloud Cartographics, Inc. | 2005 | See State Library Catalog | ||
| Plat book of Williamson Co., Ill. | 2007 | 912.773993 H64p2007 | Link to Catalog | Illinois History & Lincoln Coll. [non-circulating] |