Thika District is a former administrative district in the Central Province of Kenya. Its capital town was Thika. The district was adjacent to the northeastern border of Nairobi. The district had a population of 645.713 https://web.archive.org/web/20090530045717/http://www.cck.go.ke/html/final_annex1_cover_status.pdf.
In 2010, the district was absorbed into Kiambu County.
The district was predominantly rural, but its urban population was soaring as Nairobi was growing rapidly. Kikuyu were the dominant tribe in the district.
| Local authorities (councils) | ||||
| Authority | Type | Population* | Urban pop.* | |
|---|---|---|---|---|
| Municipality | 88,265 | 82,665 | ||
| Municipality | 109,349 | 79,741 | ||
| Thika county | County | 448,099 | 5,968 | |
| Total | - | 645,713 | 168,374 | |
| Administrative divisions | ||||
| Division | Population* | Urban pop.* | Headquarters | |
|---|---|---|---|---|
| Gatanga | 103,048 | 0 | ||
| Gatundu | 113,699 | 0 | ||
| Kakuzi | 71,622 | 0 | ||
| Kamwangi (Gatundu north) | 99,460 | 0 | ||
| Ruiru (Juja) | 150,710 | 81,709 | Ruiru | |
| Thika municipality | 107,174 | 75,893 | Thika | |
| Total | 645,713 | 157,602 | ||
The district had four constituencies: