US congresswoman Ilhan Omar has announced her marriage to her chief campaign fundraiser, Tim Mynett.

"Got married! From partners in politics to life partners, so blessed," the Somali-born politician posted on Instagram, alongside a photo of the couple.

Ms Omar, a Democrat who represents part of the state of Minnesota, is a prominent critic of President Donald Trump.

Her previous marriage to Ahmed Hirsi ended last year. They share three children.

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Got married! From partners in politics to life partners, so blessed. Alhamdulillah ??

A post shared by Ilhan Omar (@ilhanmn) on Mar 11, 2020 at 6:22pm PDT