Ontario, Kansas.
| Town | Post Office Dates | Additional Information |
| Adrian | 1880-1907 | A small hamlet situated on the ridge between Cross and Soldier Creeks. In 1894, it had a doctor, a blacksmith, a livestock dealer, a general store, a justice of the peace, and a population of 10. It was on the stagecoach line to St. Mary’s, from which its mail was delivered daily, to Alexander Griffin, the postmaster. It was 22 miles southwest of Holton, the county seat, and 12 miles North of St. Mary’s, on the Union Pacific Railroad, which was its nearest shipping and banking point. When the post office closed, it received its mail by rural delivery from Delia. |
| Avoca | 1871-1907 | Avoca was a hamlet near the western line of the county, about 15 miles southwest of Holton and 10 miles south of Havensville, its nearest shipping point and bank. In 1894, it had a jeweler, a general store, a blacksmith, and a justice of the peace. When the post office closed, it received its mail by rural delivery from Soldier. |
| Banner | 1866-1879 | |
| Birmingham | 1888-1942 | A hamlet in Franklin Township, located on the Missouri Pacific Railroad, four miles southeast of Holton. In 1910, it had a general store, a money order post office, telegraph and express offices, and a population of 50. |
| Buck Grove | 1870-1881 | |
| Calhoun | 1856-1858 | |
| Carbon | 1874-1880 | |
| Carl | 1893-1907 | Carl was located 12 miles West of Holton. After the post office closed, it received its mail from Soldier by rural route. The population in 1910 was 21. |
| Cope | 1877-1887 | |
| Delia | 1906-2017 | Delia, Kansas, is a small town in the southwest corner of Jackson County. It is also an “extinct” town, as it no longer has a post office. |
| James Crossing | 1862-1886 | |
| Larkinburg-Larkin | 1872-1963 | The town took its name from M.E. Larkin, who owned the land south of the townsite. It was laid out in 1880, although a post office named Larkin had existed since 1872, with Henry Priddy as postmaster. In 1894, it had a blacksmith, a doctor, a hotel, a livery, a harnessmaker, two constables, a school teacher, a general store, a meat market, a grain dealer, a druggist, and a justice of the peace. The town’s name changed from Larkin to Larkinburg on April 9, 1909. It was located on the Leavenworth, Kansas, and Western branch of the Union Pacific Railroad, nine miles East of Holton. It was situated in a prosperous farming community and engaged in considerable shipping. In 1910, it had two stores, a telegraph and express offices, a money order post office, and a population of 129. It was 10 miles East of Holton, the county seat and bank location. |
| Lawndale | 1877-1882 | |
| Nadeau | 1887-1913 | A hamlet located near the southern line of the county, 16 miles south of Holton, it had a money order post office, some local trade, and a population of 25 in 1910. Hoyt was the nearest railroad station. |
| New Eureka | 1858-1877 | |
| North Cedar | 1867-1887 | The post office moved to Denison. |
| Ontario | 1862-1922 | Ontario was a hamlet near the northern boundary of the county, about 10 miles northwest of Holton. In 1894, it was on the Kansas City, Wyandotte & Northwestern Railway, and the depot was about a quarter-mile North of the town center. At that time, it had a hotel, a barber, a carpenter, three grain dealers, two doctors, a general store, a flour mill, and two blacksmiths. In 1910, it was located on the Missouri Pacific Railroad, had telegraph and express offices, a money order post office, and a population of 50. It was four miles northwest of Circleville, the nearest banking point, and 14 miles from Holton, the county seat.
 Ontario, Kansas Depot, 1908.  Ontario, Kansas School. |
| Plum Station | 1868 | The post office was only open for about four months. |
| Pottawatomie Boarding School | None | Located near Hoyt, Kansas, in Jackson County, this school opened in 1875. Today, only a house and a two-story timber-frame barn, first used by the Potawatomi Mission Boarding School and Farm, remain. |
| South Cedar | 1867-1904 | A hamlet located in Cedar Township, about ten miles southeast of Holton. In 1894, it had a general store, a blacksmith, and a wagonmaker. Valley Falls was the nearest banking and shipping point. When the post office closed, it received its mail by rural route from Denison. |
| Straight Creek | 1888-1929 | A hamlet in Straight Creek Township on the Chicago, Rock Island & Pacific Railroad, six miles northeast of Holton. Before 1869, the township’s lands were part of the Kickapoo Indian reservation. J.H. Thompson claimed land in 1854 and settled in 1855. John Hibbard came in 1856. Other early settlers were S. J. Rose, William Chambers, W. L. Estes, T. Burns, James Hastings, and others. G.W. Weister built the first mill. |
| Sullivan | 1880-1883 | |
| Woburn | 1870-1872 |
Jackson County, Kansas by L.H. Everts & Co., 1887.
©Kathy Alexander/Legends of Kansas, updated July 2026.
Also See:
Sources:
1894 Gazetteer and Business Directory, R.L. Polk & Co., Detroit, Michigan.
Blackmar, Frank W. Kansas: A Cyclopedia of State History, Vol. I. Standard Publishing Company, Chicago, IL, 1912.
Cutler, William G.; History of Kansas; A. T. Andreas, Chicago, IL, 1883.
Kansas Post Office History