Based on limited info, maybe flea beetles.

tj

P.S. How 'bout that Russell Wilson.

Based on limited info, possibly aphids?

Please describe size.
Have wings?
Do they fly?
Did they jump?
Did they make holes?
What else?

Floating Row Covers may help, if those insects do not come from the soil the plants are growing in.
For help in identifying what you have pick a leaf that has some and put it in a sealable plastic (sandwich)
bag and take it to your local office of the Washington State University Cooperative Extension Service.
Starting with the least toxic insecticide, Insecticidal Soap, spraying may help keep them under control.

Here is a link that might be useful: WSU CES

They look very much like black aphids. Are there ants around too? This is my aphid spray and it works on most small bugs

In a spray bottle mix
1/4 cup of mouthwash--the kind with alcohol in it
1 teaspoon of insecticidal soap
and fill with tepid water--about room temperature

Spray in early morning or early evening. You don't want to spray when the sun can burn wet leaves or leave the plants wet for the night so they get fungal diseases

Thanks for all the advice!

There is some evidence that the systemic insecticides are contributing to the demise of the bees and other pollinators, so they may not be something you would want to use.
For relatively small infestations of non flying insects such as Aphids the best means of control is simply a sharp spray of water. Alcohol used in many home remedy sprays is an antibacterial and does little to control insects, especially in the small amounts usually used. In amounts large enough to kill insects Alcohol will also kill your plants.
Insecticidal Soaps are contact controls that once dry have no residual affect, but will harm beneficial insects as well as the pests.
Keep in mind that any poison you spray in your garden has the potential to harm every beneficial insect as well as the ones you want to target.