硒氰酸钾是一种无机化合物，化学式为KSeCN，是一种无色的、极易潮解的针状晶体。

硒和纯的氰化钾共熔，可以得到硒氰酸钾，在热水或乙醇中反应亦可：

Se + KCN → KSeCN

但是，硒氰酸根离子和醇反应会产生有恶臭的烷基硒氰酸酯，在乙醇中的反应也是不受人喜欢的。

硒和亚铁氰酸钾反应也能得到硒氰酸钾：

K₄[Fe(CN)₆] + 4 Se —→ 4 KSeCN + FeC₂ + N₂↑

Potassium selenocyanate is the inorganic compound with the formula KSeCN. It is a hygroscopic white solid that is soluble in water, decomposing in air to red selenium and potassium cyanide. The compound has been characterized by X-ray crystallography, which confirms that it is a salt. The C-N and C-Se distances are 1.12 and 1.83, respectively, consistent with triple and single bonds.