Tharaka-Nithi County: History
In 1992, Meru District was broken up into four new districts: Meru Central, Meru North, Meru South and Tharaka. Subsequently, Meru South, also known as Nithi, combined with Tharaka into the Tharaka-Nithi District. In 1998, the Tharaka-Nithi District was split into two districts, Nithi and Tharaka, but a 2009 High Court decision declared that split unconstitutional and re-combined the two. Subsequently, under the revised constitution of 2010, Tharaka-Nithi became a county.