Neutron diffraction studies of CoNb2O6 powder at 2°K indicate an ordered antiferromagnetic structure of the Co2+ spins(1). The transition temperature has not been observed in the succeptibility and field induced magnetization measurements we took on flux grown single crystals of CoNb2O6 from 3.3°K to 300°K. The crystalographic space group of CoNb2O6 is Pbcn. Group theoretical analysis of Co2+‐Co2+ bilinear interactions within the Pbcn space group indicates that both symmetric and antisymmetric Co2+‐Co2+ interactions are allowed. We show that the salient features of our experimental results at temperatures below 50°K can be accounted for in terms of the interaction between Co2+ ions occupying the lowest lying Kramers’ doublet. The local principal axes of the g tensor for the Co2+ ground doublet at all sites are found practically to coincide with the orthorhombic crystal axes giving ga=4.1±0.2, gb=4.4±0.2 and gc=5.7±0.3. The Co2+−Co2+ antisymmetric interaction happens to be negligible as compared to the symmetric one. From the temperature dependence of the paramagnetic susceptibility it is found that the dominant Co2+−Co2+ interaction along the a and c directions is the intrasublattice antiferromagnetic interaction. A complete account of this work will be published elsewhere.