The largest US semiconductor investment announcements are increasingly concentrated in a small group of states, but a simple league table can be misleading. Some companies disclose a site-level programme, others announce a multi-state commitment, and federal CHIPS awards often support projects already included in private investment totals.
American Commerce Review therefore ranks states using the clearest attributable programme values in its Industrial Investment Tracker and labels figures that cannot responsibly be allocated to one state. The result is less dramatic than adding every headline number together, but considerably more useful.
Arizona has the clearest mega-programme
TSMC's current Arizona material describes a planned $265 billion US investment programme covering six logic fabs, two advanced-packaging facilities and an R&D centre. The Commerce Department said in July that the expanded commitment would bring the total to 12 leading-edge semiconductor and packaging facilities in the United States.
Because TSMC's US manufacturing buildout is centred in Arizona, the state has the clearest claim to the largest single-company semiconductor programme in the current dataset. ACR still describes the $265 billion as planned investment rather than completed spending.
New York combines a megafab with a wider ecosystem
Micron's Clay project carries an approximately $100 billion long-term New York vision and reached first-concrete stage in July 2026. New York also hosts GlobalFoundries' Malta expansion and smaller semiconductor-supply-chain projects, giving the state breadth as well as one enormous anchor project.
Micron has since increased its overall planned US fab and technology investment to more than $250 billion through 2035. That national figure spans New York, Idaho, Virginia and other technology investment, so ACR does not assign the entire amount to New York.
Texas and Idaho matter, but the accounting is different
Texas includes Samsung's broader Central Texas programme of more than $37 billion and Texas Instruments projects, while Idaho is central to Micron's leading-edge memory manufacturing and R&D expansion. These are strategically important clusters even where the clean state-level total is smaller or harder to isolate than Arizona's TSMC programme.
This distinction will matter more as suppliers follow the fabs. Micron, for example, announced up to $3 billion of US semiconductor ecosystem investment in July, including $500 million of strategic financing support for GlobalWafers' 300mm silicon-wafer facility in Sherman, Texas.
Our view: the state ranking should measure execution next
Announced capital is only the first version of this dataset. The more valuable long-term ranking will compare construction stage, production start, employment, supplier formation and how much announced capacity actually becomes operational.
Arizona and New York currently dominate the headline investment map, but the states that create durable semiconductor ecosystems may ultimately be those that convert anchor fabs into packaging, materials, equipment and skilled-workforce clusters. ACR will keep the underlying tracker as the source of truth and update this ranking when programme values or project stages materially change.
Frequently asked questions
Which US state has the biggest semiconductor investment programme?
In ACR's current dataset, Arizona has the clearest claim through TSMC's planned $265 billion US programme centred on its Arizona manufacturing buildout. The figure is planned investment, not capital already spent.
Why doesn't ACR simply add every semiconductor announcement by state?
Because company-wide commitments, site programmes and federal awards can overlap. Adding them without adjustment would double count capital and create misleading state totals.