Four briefs use data from the 1990 Census of Population and Housing to examine housing characteristics of reservation American Indian households. Forty-eight reservations with 500 or more American Indian households were compared to all households in the United States and to nonreservation American Indian households. Data revealed that: (1) American Indian households made up less than half (45%) of all households on reservations; (2) 67 percent of reservation American Indians owned their homes, slightly more than all race groups or nonreservation American Indians; (3) homeownership rates for reservation American Indians rose steadily with age; (4) only 16 percent of reservation American Indian householders were 65 years of age or older; (5) a higher proportion of American Indian householders under age 35 lived off reservations, possibly due to younger American Indians leaving reservations because of poor employment and educational opportunities, as well as lack of housing; (6) reservation American Indian households contained a median of 3.65 persons; (7) the typical reservation home had only 4.4 rooms, nearly a whole room less than the national median; (8) nearly one-third of reservation homes were overcrowded; (9) over one-fourth of reservation American Indian homeowners lacked complete plumbing; (10) reservation American Indian households were far more likely than the typical U.S. household to live in new housing units; (11) 14 percent of reservation American Indians lived in mobile homes; (12) American Indian homes on reservations were much more likely to lack complete kitchen facilities; (13) the majority of American Indian homes on reservations did not have a telephone; (14) 22 percent of American Indian reservation households were without a motor vehicle; and (15) the most commonly used heating fuel on American Indian reservation homes was wood. The data is presented in numerous graphs and tables. (LP)