| Tatsuokajō Station | |
| Style: | JR East |
| Native Name: | 龍岡城駅 |
| Native Name Lang: | ja |
| Address: | 4917 Taguchi-Kiriai Nagatoro, Saku-shi, Nagano-ken 384-0412 |
| Country: | Japan |
| Coordinates: | 36.2044°N 138.4906°W |
| Operator: | JR East |
| Line: | Koumi Line |
| Distance: | 62.1 km from |
| Platforms: | 1 side platform |
| Elevation: | 700.1 meters |
| Status: | Unstaffed |
| Opened: | 8 December 1915 |
| Former: | Onara (to 1952) |
| Passengers: | 162 |
| Pass Year: | FY2011 |
| Map Type: | Japan Nagano Prefecture#Japan |
| Map Dot Label: | Tatsuokajō Station |
is a train station in the city of Saku, Nagano, Japan, operated by East Japan Railway Company (JR East).[1]
Tatsuokajō Station is served by the Koumi Line and is 62.1 kilometers from the terminus of the line at Kobuchizawa Station.[1]
The station consists of one ground-level side platform serving a single bi-directional track. The station is unattended.[1]
Tatsuokajō Station opened on 8 August 1915 as . It was elevated to a full passenger station on 1 September 1934. The station was closed from 1944 to 1952. It was renamed to its present name on its reopening on 1 March 1952.[1] With the dissolution and privatization of JNR on April 1, 1987, the station came under the control of the East Japan Railway Company (JR East).