Indian Housing Improvement Act of 1990

Indian Housing Improvement Act of 1990 - Title I: Indian Public Housing - Increases budget authority for Indian public housing grants under the United States Housing Act of 1937.

Reserves specified community development block grant amounts for an Indian public housing child care demonstration program.

Amends the United States Housing Act of 1937 to make Indian self-help housing eligible for comprehensive improvement assistance.

Title II: Section 8 Voucher Program Eligibility for Indian Housing Authorities - Amends the United States Housing Act of 1937 to make Indian housing authorities eligible for the section 8 housing voucher program.

Title III: Inclusion of Indian Tribes Under McKinney Homeless Assistance Act Programs - Amends the Stewart B. McKinney Homeless Assistance Act to add the National Congress of American Indians to the Emergency Food and Shelter Program National Board.

Makes Indian tribes eligible for: (1) comprehensive homeless assistance; (2) emergency shelter grants; (3) the supportive housing demonstration program; (4) section 8 assistance for single room occupancy dwellings; and (5) grants for education for homeless children and youth.

Amends the Public Health Service Act to make Indian tribes eligible for: (1) community mental health services block grants; and (2) community mental health services demonstration projects for chronically ill homeless individuals.

Title IV: Miscellaneous Indian Housing Program Provisions - Amends the Housing Act of 1949 to require the Secretary of Agriculture, in the event of a Farmers Home Administration loan default on Indian public land, to: (1) pursue liquidation only after offering to transfer the account to an eligible tribal member, the tribe, or the Indian housing authority; and (2) dispose of the property only to one of such entities.

Directs the Comptroller General of the United States to conduct a study of neighborhood development opportunities on Indian trust lands.

Authorizes: (1) the Secretary of Housing and Urban Development to waive Indian housing program matching fund requirements; and (2) the related use of Federal funds for matching amounts.