Can sacroiliac pain be in groin and upper thigh on both sides?

Yes but. Typically, this pain is localized in the posterior buttock region & can refer down to the upper back part of your thighs & sometimes into the groin but this could be hip joint pain if in groins & the front of your thighs. Other spinal regions that refer to the groin are the facet joints at l5-s1 & a high level disc problem like l1-2 level. If the pain is restricting your activities get evaluated.