The ruling BJP-led NDA is leading in 22 seats, while the Grand Alliance spearheaded by the Congress is ahead in 15 places, according to initial trends available from the counting of postal ballots in Assam, officials said on Sunday.
The newly formed Assam Jatiya Parishad-Raijor Dal alliance is leading in four assembly seats.
BJP candidates are leading in 16 seats, while those of its ally AGP in six.
The Congress has established initial leads in 14 places and AIUDF in one.
Raijor Dal chief and jailed anti-CAA protest leader Akhil Gogoi is leading from Sibsagar.
Chief Minister Sarbananda Sonowal, Health Minister Himanta Biswa Sarma and AGP chief and minister Atul Bora are leading from Majuli, Jalukbari and Bokakhat.
Congress Legislative Party chief and his deputy Debabrata Saikia and Rakibul Hussain both are trailing from Nazira and Samaguri.
Assam has a 126-member assembly and 64 seats are needed for a simple majority.