I know it's best to steam spinach to get the maximum nutrition but can you still get a good amount of nutrition when you eat it raw, like in a salad?

Spinach nutrition: Popeye ate cooked spinach for good reason. :-) you can get some nutrition from raw spinach, but the antioxidants like beta-carotene & lutein (good for your vision, too!) are much more available when cell walls are broken down by steaming or sauteing. Also, the minerals in raw spinach (like calcium, magnesium, & iron) are bound to oxalic acid. Gently cooking releases them for you to absorb.

Spinach: Yes, for sure - its digestion may be a bit impaired but spinach raw is wonderful for you