-
- Rabb, Edward M.
- Railroad Collection
- Raine, William
- Rak, Charles
- Ramenofsky, Elizabeth
- Rapp, John H.
- Rasch, Philip J.
- Ration Books from World War II
- Ray Silver Lead Mining Company
- Read-Strauss Families
- Reavis, James A.
- Reavis-Peralta Land Grant Case
- Red Carbonate Group Mine
- Redfield Family
- Reed, William
- Refsnes, Joseph
- Reid & Hazard Architectural Drawings
- Reinhold, Ruth Aviation Collection
- Report on Conditions for Cavalry
- Reynolds, Albert
- Rhodes, Rosa R.
- Rice Family
- Rice, Michael M.
- Richardson, Gladwell
- Richmond, Goldie
- Riddell, Robert M.
- Rider, Jane H.
- Riell, Robert
- Riggs, W. C.
- Rillito Race Track
- Ringgold, Jennie P.
- Riordan Family
- Roberts, Clara F.
- Roberts, Paul
- Robinson, Samuel
- Robles, Carlos G.
- Roche, William
- Rockfellow, John
- Rodgers, David
- Rodriguez, Jose
- Romero Family
- Ronstadt Family
- Roosevelt Business Ledgers
- Roosevelt Dam Modification
- Roper, Jane M.
- Rosemont Archaeological Project
- Rosita Operetta
- Roskruge, George A.
- Roskruge, George J. (MS 620)
- Roskruge, George J. (MS 1083)
- Roskruge, George J. (MS 1214)
- Ross, William
- Roy MacDonald & Bonanza Mining Company
- Ruggles, Levi
- Rundel, Delaney
- Russell, Don
- Russell, Frank E.
- Ruth, Viola Music Collection
