Definition
Occupational segregation is the systematic confinement of Black workers in the twentieth-century U.S. to a small set of low-wage, low-status jobs — Pullman porter, packinghouse worker, domestic servant, laundress, hod carrier, postal worker, longshoreman — regardless of education, training, or aptitude.
Even within the professions, the same logic applied. Black doctors served Black patients; Black lawyers argued in Black-clientele courts; Black teachers taught in Black-only schools. A nominally open occupation was, in practice, a segregated one.
Why it matters
How it works
The mechanism combined three layers of exclusion.
Hiring rules and union locals
Most industrial employers operated a "Black jobs / white jobs" categorization, with Black workers explicitly assigned to the dirtiest, hottest, most dangerous, and lowest-paid stations. Steel mills put Black workers on the coke ovens; meatpacking on the killing floor; auto plants on foundry work. Many craft unions (electricians, plumbers, sheet-metal workers) maintained whites-only locals into the 1960s, effectively excluding Black workers from the apprenticeship pipeline to skilled trades.
Customer and clientele markets
Even when a Black worker could enter a profession (doctor, lawyer, dentist, teacher, mortician), social segregation meant a Black clientele. Hospitals refused Black surgeons admitting privileges; white juries discounted Black attorneys; white school districts would not hire Black teachers. The result was a parallel Black professional economy, smaller and lower-paying than the white one.
Geographic concentration
Occupational segregation reinforced housing segregation. Black workers concentrated in industries (meatpacking in Chicago, steel in Pittsburgh, auto in Detroit, garment in New York) and worked near home in jobs they could walk or take a streetcar to. When those industries collapsed from the 1960s onward — Chicago meatpacking closed by 1970, Detroit auto by the 1980s — the geographic concentration left those communities particularly exposed.
The Great Migration was, in part, a wager that even the bottom of the Northern occupational hierarchy paid better and offered more dignity than the top of the Southern one. By the wage numbers, the wager paid off: a 1942 Chicago packinghouse worker earned in a week roughly what a Mississippi sharecropper might net in a year. The ceiling above that floor, however, remained close to the floor.