Employment in manufacturing as a share of overall employment was most concentrated in the Midwest. Specifically, Indiana (20.9 percent) and Michigan (20.4 percent) had the greatest concentrations. The concentration of state employment share in the manufacturing sector (with highlights showing the portion of manufacturing that is although within the high-tech sector) is visible in the map, below.
For details: https://ssti.org/blog/useful-stats-employment-high-tech-and-manufacturing-state-2013-2017?utm_source=SSTI+Weekly+Digest&utm_campaign=cd5ff426be-EMAIL_CAMPAIGN_2019_05_02_02_47&utm_medium=email&utm_term=0_ecf5992d4c-cd5ff426be-220101229