The first ever state constituted on linguistic basis is Andhra Pradesh.

The formation of states on linguistic basis was a significant event in the history of India. Prior to this, states were mostly formed based on administrative convenience or historical reasons. The linguistic reorganization of states aimed to provide a sense of identity and representation to different linguistic communities in the country.

Background:
- The demand for linguistic states gained momentum after India's independence in 1947.
- Various language movements and protests were organized by different linguistic communities to demand the formation of states based on language.
- The States Reorganization Commission (SRC) was set up in 1953 to examine the demand for linguistic states and make recommendations.

Formation of Andhra Pradesh:
- Andhra Pradesh was the first state to be formed on linguistic basis in India.
- The demand for a separate state for Telugu-speaking people of Madras Presidency (present-day Tamil Nadu) emerged in the early 20th century.
- The Andhra Mahasabha, a linguistic organization, played a crucial role in leading the movement for a separate Andhra state.
- The States Reorganization Commission, headed by Fazal Ali, recommended the formation of Andhra Pradesh in its report submitted in 1955.
- The commission considered various factors such as language, culture, geography, and administrative feasibility in making its recommendations.
- On October 1, 1953, Andhra Pradesh was officially formed by carving out Telugu-speaking areas from the Madras Presidency.
- The city of Kurnool was initially designated as the capital of Andhra Pradesh.

Significance:
- The formation of Andhra Pradesh on linguistic basis set a precedent for the reorganization of states in India.
- It paved the way for the formation of other linguistic states such as Maharashtra, Karnataka, and Gujarat in subsequent years.
- The linguistic reorganization of states provided a sense of linguistic and cultural identity to various communities and fostered regional development and governance.

In conclusion, Andhra Pradesh holds the distinction of being the first state constituted on linguistic basis in India. The linguistic reorganization of states played a crucial role in shaping the cultural and political landscape of the country, ensuring representation and identity for different linguistic communities.