Agiaon (Hindi: अगिआंव) is a Gram Panchayat and corresponding community development block in Bhojpur district of Bihar, India.

[1] Agiaon is a rural block with no large urban centres.

In 2011, its sex ratio was 920 females to every 1000 males, which was higher than the Bhojpur district average of 907.

[1] Most of Agiaon block's workforce was employed in agriculture in 2011, with 30.54% of workers being cultivators who owned or leased their own land and another 47.60% being agricultural labourers who worked someone else's land for wages.

[1] Agiaon block contains the following 72 villages:[1] (GP = Gram Panchayat)